{"id":4326,"date":"2016-05-13T11:49:00","date_gmt":"2016-05-13T06:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-7-maths-algebraic-expressions-ex-12-1\/"},"modified":"2018-07-09T11:32:11","modified_gmt":"2018-07-09T06:02:11","slug":"ncert-solutions-for-class-7-maths-exercise-12-1","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/","title":{"rendered":"NCERT Solutions for Class 7 Maths Exercise 12.1"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#NCERT_Solutions_for_Class_7_Maths_Algebraic_Expressions\" >NCERT Solutions for Class 7 Maths\u00a0Algebraic Expressions<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Class_%E2%80%93VII_Mathematics_Ex_121\" >Class \u2013VII Mathematics (Ex. 12.1)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_1Get_the_algebraic_expressions_in_the_following_cases_using_variables_constants_and_arithmetic_operations\" >Question 1.Get the algebraic expressions in the following cases using variables, constants and arithmetic operations:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_2i_Identify_the_terms_and_their_factors_in_the_following_expressions_show_the_terms_and_factors_by_tree_diagram\" >Question 2.(i) Identify the terms and their factors in the following expressions, show the terms and factors by tree diagram:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_3Identify_the_numerical_coefficients_of_terms_other_than_constants_in_the_following_expressions\" >Question 3.Identify the numerical coefficients of terms (other than constants) in the following expressions:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_4a_Identify_terms_which_contain_texxtex_and_give_the_coefficient_of_texxtex\" >Question 4.(a) Identify terms which contain {tex}x{\/tex} and give the coefficient of {tex}x.{\/tex}<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_5Classify_into_monomials_binomials_and_trinomials\" >Question 5.Classify into monomials, binomials and trinomials:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_6State_whether_a_given_pair_of_terms_is_of_like_or_unlike_terms\" >Question 6.State whether a given pair of terms is of like or unlike terms:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#Question_7Identify_like_terms_in_the_following\" >Question 7.Identify like terms in the following:<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#NCERT_Solutions_for_Class_7_Maths_Exercise_121\" >NCERT Solutions for Class 7 Maths Exercise 12.1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-7-maths-exercise-12-1\/#CBSE_app_for_Students\" >CBSE app for Students<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions for Class 7 Maths Exercise 12.1 book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 7 Maths chapter wise NCERT solution for Maths Book all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>NCERT solutions for Maths\u00a0Algebraic Expressions <\/strong><strong><a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-07-mathematics-algebraic-expressions\/1521\/ncert-solutions\/5\/\">Download as PDF<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/07_Maths_Book.jpg\" alt=\"NCERT Solutions for Class 7 Maths Exercise 12.1\" width=\"169\" height=\"214\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_7_Maths_Algebraic_Expressions\"><\/span>NCERT Solutions for Class 7 Maths\u00a0Algebraic Expressions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h6 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Class_%E2%80%93VII_Mathematics_Ex_121\"><\/span><strong>Class \u2013VII Mathematics (Ex. 12.1)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<h6><span class=\"ez-toc-section\" id=\"Question_1Get_the_algebraic_expressions_in_the_following_cases_using_variables_constants_and_arithmetic_operations\"><\/span><strong>Question 1.<\/strong>Get the algebraic expressions in the following cases using variables, constants and arithmetic operations:<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<ol>\n<li>Subtraction of {tex}z{\/tex} from {tex}y.{\/tex}<\/li>\n<li>One-half of the sum of numbers {tex}x{\/tex} and {tex}y.{\/tex}<\/li>\n<li>The number {tex}z{\/tex} multiplied by itself.<\/li>\n<li>One-fourth of the product of numbers {tex}p{\/tex} and {tex}q.{\/tex}<\/li>\n<li>Numbers {tex}x{\/tex} and {tex}y{\/tex} both squared and added.<\/li>\n<li>Number 5 added to three times the product of {tex}m{\/tex} and {tex}n.{\/tex}<\/li>\n<li>Product of numbers {tex}y{\/tex} and {tex}z{\/tex} subtracted from 10.<\/li>\n<li>Sum of numbers {tex}a{\/tex} and {tex}b{\/tex} subtracted from their product.<\/li>\n<\/ol>\n<p><strong>Answer:<\/strong><\/p>\n<p>(i) {tex}y &#8211; z{\/tex}<\/p>\n<p>(ii) {tex}\\frac{{x + y}}{2}{\/tex}<\/p>\n<p>(iii) {tex}{z^2}{\/tex}<\/p>\n<p>(iv) {tex}\\frac{{pq}}{4}{\/tex}<\/p>\n<p>(v) {tex}{x^2} + {y^2}{\/tex}<\/p>\n<p>(vi) {tex}3mn + 5{\/tex}<\/p>\n<p>(vii) {tex}10 &#8211; yz{\/tex}<\/p>\n<p>(viii) {tex}ab &#8211; \\left( {a + b} \\right){\/tex}<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 7 Maths Exercise 12.1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"Question_2i_Identify_the_terms_and_their_factors_in_the_following_expressions_show_the_terms_and_factors_by_tree_diagram\"><\/span><strong>Question<\/strong> 2.(i) Identify the terms and their factors in the following expressions, show the terms and factors by tree diagram:<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>(a) {tex}x &#8211; 3{\/tex}<\/p>\n<p>(b) {tex}1 + x + {x^2}{\/tex}<\/p>\n<p>(c) {tex}y &#8211; {y^3}{\/tex}<\/p>\n<p>(d) {tex}5x{y^2} + 7{x^2}y{\/tex}<\/p>\n<p>(e) {tex} &#8211; ab + 2{b^2} &#8211; 3{a^2}{\/tex}<\/p>\n<p>(ii) Identify the terms and factors in the expressions given below:<\/p>\n<p>(a) {tex} &#8211; 4x + 5{\/tex}<\/p>\n<p>(b) {tex} &#8211; 4x + 5y{\/tex}<\/p>\n<p>(c) {tex}5y + 3{y^2}{\/tex}<\/p>\n<p>(d) {tex}xy + 2{x^2}{y^2}{\/tex}<\/p>\n<p>(e) {tex}pq + q{\/tex}<\/p>\n<p>(f) {tex}1.2ab &#8211; 2.4b + 3.6a{\/tex}<\/p>\n<p>(g) {tex}\\frac{3}{4}x + \\frac{1}{4}{\/tex}<\/p>\n<p>(h) {tex}0.1{p^2} + 0.2{q^2}{\/tex}<\/p>\n<p><strong>Answer:<\/strong><\/p>\n<p>(i) (a) {tex}x &#8211; 3{\/tex}<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/07\/mathematics\/07_math_ncert_ch12_05.jpg\" \/><\/p>\n<p>Expression<\/p>\n<p>Terms<\/p>\n<p>Factors<\/p>\n<p>(b) {tex}1 + x + {x^2}{\/tex}<\/p>\n<p>Expression<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/07\/mathematics\/07_math_ncert_ch12_06.jpg\" \/><\/p>\n<p>Terms<\/p>\n<p>Factors<\/p>\n<p>(c) {tex}y &#8211; {y^3}{\/tex}<\/p>\n<p>Expression<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/07\/mathematics\/07_math_ncert_ch12_07.jpg\" \/><\/p>\n<p>Terms<\/p>\n<p>Factors<\/p>\n<p>(d) {tex}5x{y^2} + 7{x^2}y{\/tex}<\/p>\n<p>Expression<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/07\/mathematics\/07_math_ncert_ch12_08.jpg\" \/><\/p>\n<p>Terms<\/p>\n<p>Factors<\/p>\n<p>(e) {tex} &#8211; ab + 2{b^2} &#8211; 3{a^2}{\/tex}<\/p>\n<p>Expression<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/ncert\/07\/mathematics\/07_math_ncert_ch12_09.jpg\" \/><\/p>\n<p>Terms<\/p>\n<p>Factors \u2013<\/p>\n<p>(ii) (a) {tex} &#8211; 4x + 5{\/tex}<\/p>\n<p>Terms: {tex} &#8211; 4x,5{\/tex}<\/p>\n<p>Factors: {tex} &#8211; 4,x{\\text{ }};{\\text{ }}5{\/tex}<\/p>\n<p>(b) {tex} &#8211; 4x + 5y{\/tex}<\/p>\n<p>Terms: {tex} &#8211; 4x,5y{\/tex}<\/p>\n<p>Factors: {tex} &#8211; 4,x{\\text{ }};{\\text{ }}5,y{\/tex}<\/p>\n<p>(c) {tex}5y + 3{y^2}{\/tex}<\/p>\n<p>Terms: {tex}5y,3{y^2}{\/tex}<\/p>\n<p>Factors: {tex}5,y{\\text{ }};{\\text{ }}3,y,y{\/tex}<\/p>\n<p>(d) {tex}xy + 2{x^2}{y^2}{\/tex}<\/p>\n<p>Terms: {tex}xy,2{x^2}{y^2}{\/tex}<\/p>\n<p>Factors: {tex}x,y{\\text{ }};{\\text{ }}2x,x,y,y{\/tex}<\/p>\n<p>(e) {tex}pq + q{\/tex}<\/p>\n<p>Terms: {tex}pq,q{\/tex}<\/p>\n<p>Factors: {tex}p,q{\\text{ }};{\\text{ }}q{\/tex}<\/p>\n<p>(f) {tex}1.2ab &#8211; 2.4b + 3.6a{\/tex}<\/p>\n<p>Terms: {tex}1.2ab, &#8211; 2.4b,3.6a{\/tex}<\/p>\n<p>Factors: {tex}1.2,a,b{\\text{ }};{\\text{ }} &#8211; 2.4,b{\\text{ }};{\\text{ }}3.6,a{\/tex}<\/p>\n<p>(g) {tex}\\frac{3}{4}x + \\frac{1}{4}{\/tex}<\/p>\n<p>Terms: {tex}\\frac{3}{4}x,\\frac{1}{4}{\/tex}<\/p>\n<p>Factors: {tex}\\frac{3}{4},x{\\text{ }};{\\text{ }}\\frac{1}{4}{\/tex}<\/p>\n<p>(h) {tex}0.1{p^2} + 0.2{q^2}{\/tex}<\/p>\n<p>Terms: {tex}0.1{p^2},0.2{q^2}{\/tex}<\/p>\n<p>Factors: {tex}0.1,p,p{\\text{ }};{\\text{ }}0.2,q,q{\/tex}<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 7 Maths Exercise 12.1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"Question_3Identify_the_numerical_coefficients_of_terms_other_than_constants_in_the_following_expressions\"><\/span><strong>Question 3.<\/strong>Identify the numerical coefficients of terms (other than constants) in the following expressions:<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>(i){tex}5 &#8211; 3{t^2}{\/tex}<\/p>\n<p>(ii){tex}1 + t + {t^2} + {t^3}{\/tex}<\/p>\n<p>(iii){tex}x + 2xy + 3y{\/tex}<\/p>\n<p>(iv) {tex}100m + 1000n{\/tex}<\/p>\n<p>(v){tex} &#8211; {p^2}{q^2} + 7pq{\/tex}<\/p>\n<p>(vi) {tex}1.2a + 0.8b{\/tex}<\/p>\n<p>(vii) {tex}3.14{r^2}{\/tex}<\/p>\n<p>(viii) {tex}2\\left( {l + b} \\right){\/tex}<\/p>\n<p>(ix) {tex}0.1y + 0.01{y^2}{\/tex}<\/p>\n<p><strong>Answer:<\/strong><\/p>\n<table class=\"responsive\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>S.No.<\/td>\n<td>Expression<\/td>\n<td>Terms<\/td>\n<td>Numerical Coefficient<\/td>\n<\/tr>\n<tr>\n<td>(i)<\/td>\n<td>{tex}5 &#8211; 3{t^2}{\/tex}<\/td>\n<td>{tex} &#8211; 3{t^2}{\/tex}<\/td>\n<td>{tex} &#8211; 3{\/tex}<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\">(ii)<\/td>\n<td rowspan=\"3\">{tex}1 + t + {t^2} + {t^3}{\/tex}<\/td>\n<td>{tex}t{\/tex}<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>{tex}{t^2}{\/tex}<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>{tex}{t^3}{\/tex}<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\">(iii)<\/td>\n<td rowspan=\"3\">{tex}x + 2xy + 3y{\/tex}<\/td>\n<td>{tex}x{\/tex}<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>{tex}2xy{\/tex}<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>{tex}3y{\/tex}<\/td>\n<td>3<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(iv)<\/td>\n<td rowspan=\"2\">{tex}100m + 1000n{\/tex}<\/td>\n<td>{tex}100m{\/tex}<\/td>\n<td>100<\/td>\n<\/tr>\n<tr>\n<td>{tex}1000n{\/tex}<\/td>\n<td>1000<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(v)<\/td>\n<td rowspan=\"2\">{tex} &#8211; {p^2}{q^2} + 7pq{\/tex}<\/td>\n<td>{tex} &#8211; {p^2}{q^2}{\/tex}<\/td>\n<td>{tex} &#8211; 1{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>{tex}7pq{\/tex}<\/td>\n<td>7<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(vi)<\/td>\n<td rowspan=\"2\">{tex}1.2a + 0.8b{\/tex}<\/td>\n<td>{tex}1.2a{\/tex}<\/td>\n<td>1.2<\/td>\n<\/tr>\n<tr>\n<td>{tex}0.8b{\/tex}<\/td>\n<td>0.8<\/td>\n<\/tr>\n<tr>\n<td>(vii)<\/td>\n<td>{tex}3.14{r^2}{\/tex}<\/td>\n<td>{tex}3.14{r^2}{\/tex}<\/td>\n<td>3.14<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(viii)<\/td>\n<td rowspan=\"2\">{tex}2\\left( {l + b} \\right) = 2l + 2b{\/tex}<\/td>\n<td>{tex}2l{\/tex}<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>{tex}2b{\/tex}<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(ix)<\/td>\n<td rowspan=\"2\">{tex}0.1y + 0.01{y^2}{\/tex}<\/td>\n<td>{tex}0.1y{\/tex}<\/td>\n<td>0.1<\/td>\n<\/tr>\n<tr>\n<td>{tex}0.01{y^2}{\/tex}<\/td>\n<td>0.01<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 7 Maths Exercise 12.1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"Question_4a_Identify_terms_which_contain_texxtex_and_give_the_coefficient_of_texxtex\"><\/span><strong>Question<\/strong> 4.(a) Identify terms which contain {tex}x{\/tex} and give the coefficient of {tex}x.{\/tex}<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>(i) {tex}{y^2}x + y{\/tex}<\/p>\n<p>(ii) {tex}13{y^2} &#8211; 8yx{\/tex}<\/p>\n<p>(iii) {tex}x + y + 2{\/tex}<\/p>\n<p>(iv) {tex}5 + z + zx{\/tex}<\/p>\n<p>(v) {tex}1 + x + xy{\/tex}<\/p>\n<p>(vi) {tex}12x{y^2} + 25{\/tex}<\/p>\n<p>(vii) {tex}7x + x{y^2}{\/tex}<\/p>\n<p>(b) Identify terms which contain {tex}{y^2}{\/tex} and give the coefficient of {tex}{y^2}.{\/tex}<\/p>\n<p>(i) {tex}8 &#8211; x{y^2}{\/tex}<\/p>\n<p>(ii) {tex}5{y^2} + 7x{\/tex}<\/p>\n<p>(iii) {tex}2{x^2}y &#8211; 15x{y^2} + 7{y^2}{\/tex}<\/p>\n<p><strong>Answer:<\/strong><\/p>\n<p><strong>(a)<\/strong><\/p>\n<table class=\"responsive\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>S.No.<\/td>\n<td>Expression<\/td>\n<td>Term with factor {tex}x{\/tex}<\/td>\n<td>Coefficient of {tex}x{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>(i)<\/td>\n<td>{tex}{y^2}x + y{\/tex}<\/td>\n<td>{tex}{y^2}x{\/tex}<\/td>\n<td>{tex}{y^2}{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>(ii)<\/td>\n<td>{tex}13{y^2} &#8211; 8yx{\/tex}<\/td>\n<td>{tex} &#8211; 8yx{\/tex}<\/td>\n<td>{tex} &#8211; 8y{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>(iii)<\/td>\n<td>{tex}x + y + 2{\/tex}<\/td>\n<td>{tex}x{\/tex}<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>(iv)<\/td>\n<td>{tex}5 + z + zx{\/tex}<\/td>\n<td>{tex}zx{\/tex}<\/td>\n<td>{tex}z{\/tex}<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(v)<\/td>\n<td rowspan=\"2\">{tex}1 + x + xy{\/tex}<\/td>\n<td>{tex}x{\/tex}<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>{tex}xy{\/tex}<\/td>\n<td>{tex}y{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>(vi)<\/td>\n<td>{tex}12x{y^2} + 25{\/tex}<\/td>\n<td>{tex}12x{y^2}{\/tex}<\/td>\n<td>{tex}12{y^2}{\/tex}<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(vii)<\/td>\n<td rowspan=\"2\">{tex}7x + x{y^2}{\/tex}<\/td>\n<td>{tex}x{y^2}{\/tex}<\/td>\n<td>{tex}{y^2}{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>{tex}7x{\/tex}<\/td>\n<td>7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>(b)<\/p>\n<table class=\"responsive\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>S.No.<\/td>\n<td>Expression<\/td>\n<td>Term contains {tex}{y^2}{\/tex}<\/td>\n<td>Coefficient of {tex}{y^2}{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>(i)<\/td>\n<td>{tex}8 &#8211; x{y^2}{\/tex}<\/td>\n<td>{tex} &#8211; x{y^2}{\/tex}<\/td>\n<td>{tex} &#8211; x{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>(ii)<\/td>\n<td>{tex}5{y^2} + 7x{\/tex}<\/td>\n<td>{tex}5{y^2}{\/tex}<\/td>\n<td>5<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">(iii)<\/td>\n<td rowspan=\"2\">{tex}2{x^2}y &#8211; 15x{y^2} + 7{y^2}{\/tex}<\/td>\n<td>{tex} &#8211; 15x{y^2}{\/tex}<\/td>\n<td>{tex} &#8211; 15x{\/tex}<\/td>\n<\/tr>\n<tr>\n<td>{tex}7{y^2}{\/tex}<\/td>\n<td>7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 7 Maths Exercise 12.1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"Question_5Classify_into_monomials_binomials_and_trinomials\"><\/span><strong>Question 5.<\/strong>Classify into monomials, binomials and trinomials:<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>(i) {tex}4y &#8211; 7x{\/tex}<\/p>\n<p>(ii) {tex}{y^2}{\/tex}<\/p>\n<p>(iii) {tex}x + y &#8211; xy{\/tex}<\/p>\n<p>(iv) {tex}100{\/tex}<\/p>\n<p>(v) {tex}ab &#8211; a &#8211; b{\/tex}<\/p>\n<p>(vi) {tex}5 &#8211; 3t{\/tex}<\/p>\n<p>(vii) {tex}4{p^2}q &#8211; 4p{q^2}{\/tex}<\/p>\n<p>(viii) {tex}7mn{\/tex}<\/p>\n<p>(ix) {tex}{z^2} &#8211; 3z + 8{\/tex}<\/p>\n<p>(x) {tex}{a^2} + {b^2}{\/tex}<\/p>\n<p>(xi) {tex}{z^2} + z{\/tex}<\/p>\n<p>(xii) {tex}1 + x + {x^2}{\/tex}<\/p>\n<p><strong>Answer:<\/strong><\/p>\n<table class=\"responsive\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>S.No.<\/td>\n<td>Expression<\/td>\n<td>Type of Polynomial<\/td>\n<\/tr>\n<tr>\n<td>(i)<\/td>\n<td>{tex}4y &#8211; 7z{\/tex}<\/td>\n<td>Binomial<\/td>\n<\/tr>\n<tr>\n<td>(ii)<\/td>\n<td>{tex}{y^2}{\/tex}<\/td>\n<td>Monomial<\/td>\n<\/tr>\n<tr>\n<td>(iii)<\/td>\n<td>{tex}x + y &#8211; xy{\/tex}<\/td>\n<td>Trinomial<\/td>\n<\/tr>\n<tr>\n<td>(iv)<\/td>\n<td>100<\/td>\n<td>Monomial<\/td>\n<\/tr>\n<tr>\n<td>(v)<\/td>\n<td>{tex}ab &#8211; a &#8211; b{\/tex}<\/td>\n<td>Trinomial<\/td>\n<\/tr>\n<tr>\n<td>(vi)<\/td>\n<td>{tex}5 &#8211; 3t{\/tex}<\/td>\n<td>Binomial<\/td>\n<\/tr>\n<tr>\n<td>(vii)<\/td>\n<td>{tex}4{p^2}q &#8211; 4p{q^2}{\/tex}<\/td>\n<td>Binomial<\/td>\n<\/tr>\n<tr>\n<td>(viii)<\/td>\n<td>{tex}7mn{\/tex}<\/td>\n<td>Monomial<\/td>\n<\/tr>\n<tr>\n<td>(ix)<\/td>\n<td>{tex}{z^2} &#8211; 3z + 8{\/tex}<\/td>\n<td>Trinomial<\/td>\n<\/tr>\n<tr>\n<td>(x)<\/td>\n<td>{tex}{a^2} + {b^2}{\/tex}<\/td>\n<td>Binomial<\/td>\n<\/tr>\n<tr>\n<td>(xi)<\/td>\n<td>{tex}{z^2} + z{\/tex}<\/td>\n<td>Binomial<\/td>\n<\/tr>\n<tr>\n<td>(xii)<\/td>\n<td>{tex}1 + x + {x^2}{\/tex}<\/td>\n<td>Trinomial<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 7 Maths Exercise 12.1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"Question_6State_whether_a_given_pair_of_terms_is_of_like_or_unlike_terms\"><\/span><strong>Question 6.<\/strong>State whether a given pair of terms is of like or unlike terms:<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>(i){tex}1,{\\text{ }}100{\/tex}<\/p>\n<p>(ii){tex} &#8211; 7x,\\frac{5}{2}x{\/tex}<\/p>\n<p>(iii){tex} &#8211; 29x, &#8211; 29y{\/tex}<\/p>\n<p>(iv) {tex}14xy,42yx{\/tex}<\/p>\n<p>(v) {tex}4{m^2}p,4m{p^2}{\/tex}<\/p>\n<p>(vi) {tex}12xz,12{x^2}{z^2}{\/tex}<\/p>\n<p><strong>Answer:<\/strong><\/p>\n<table class=\"responsive\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>S.No.<\/td>\n<td>Pair of terms<\/td>\n<td>Like \/ Unlike terms<\/td>\n<\/tr>\n<tr>\n<td>(i)<\/td>\n<td>1, 100<\/td>\n<td>Like terms<\/td>\n<\/tr>\n<tr>\n<td>(ii)<\/td>\n<td>{tex} &#8211; 7x,\\frac{5}{2}x{\/tex}<\/td>\n<td>Like terms<\/td>\n<\/tr>\n<tr>\n<td>(iii)<\/td>\n<td>{tex} &#8211; 29x, &#8211; 29y{\/tex}<\/td>\n<td>Unlike terms<\/td>\n<\/tr>\n<tr>\n<td>(iv)<\/td>\n<td>{tex}14xy,42yx{\/tex}<\/td>\n<td>Like terms<\/td>\n<\/tr>\n<tr>\n<td>(v)<\/td>\n<td>{tex}4{m^2}p,4m{p^2}{\/tex}<\/td>\n<td>Unlike terms<\/td>\n<\/tr>\n<tr>\n<td>(vi)<\/td>\n<td>{tex}12xz,12{x^2}{z^2}{\/tex}<\/td>\n<td>Unlike terms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 7 Maths Exercise 12.1<\/p>\n<h6><span class=\"ez-toc-section\" id=\"Question_7Identify_like_terms_in_the_following\"><\/span><strong style=\"line-height: 1.6;\">Question 7.<\/strong><span style=\"line-height: 1.6;\">Identify like terms in the following:<\/span><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>(a) {tex} &#8211; x{y^2}, &#8211; 4y{x^2},8{x^2},2x{y^2},7y, &#8211; 11{x^2} &#8211; 100x, &#8211; 11yx,20{x^2}y, &#8211; 6{x^2},y,2xy,3x{\/tex}<\/p>\n<p>(b){tex}10pq,7p,8q, &#8211; {p^2}{q^2}, &#8211; 7qp, &#8211; 100q, &#8211; 23,12{q^2}{p^2}, &#8211; 5{p^2},41,2405p,78qp,13{p^2}q,q{p^2},701{p^2}{\/tex}<\/p>\n<p><strong>Answer:<\/strong><\/p>\n<p>(a) Like terms are:<\/p>\n<p>(i) {tex} &#8211; x{y^2},2x{y^2}{\/tex}<\/p>\n<p>(ii) {tex} &#8211; 4y{x^2},20{x^2}y{\/tex}<\/p>\n<p>(iii) {tex}8{x^2}, &#8211; 11{x^2}, &#8211; 6{x^2}{\/tex}<\/p>\n<p>(iv) {tex}7y,y{\/tex}<\/p>\n<p>(v) {tex} &#8211; 100x,3x{\/tex}<\/p>\n<p>(vi) {tex} &#8211; 11yx,2xy{\/tex}<\/p>\n<p>(b) Like terms are:<\/p>\n<p>(i) {tex}10pq, &#8211; 7pq,78pq{\/tex}<\/p>\n<p>(ii) {tex}7p,2405p{\/tex}<\/p>\n<p>(iii) {tex}8q, &#8211; 100q{\/tex}<\/p>\n<p>(iv) {tex} &#8211; {p^2}{q^2},12{p^2}{q^2}{\/tex}<\/p>\n<p>(v) {tex} &#8211; 12,41{\/tex}<\/p>\n<p>(vi) {tex} &#8211; 5{p^2},701{p^2}{\/tex}<\/p>\n<p>(vii) {tex}13{p^2}q,q{p^2}{\/tex}<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_7_Maths_Exercise_121\"><\/span>NCERT Solutions for Class 7 Maths Exercise 12.1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 7 Maths PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 7 Maths includes text book solutions from Class 7 Maths Book . NCERT Solutions for CBSE Class 7 Maths have total 15 chapters. 7 Maths NCERT Solutions in PDF for free Download on our website. Ncert Maths class 7 solutions PDF and Maths ncert class 7 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_app_for_Students\"><\/span>CBSE app for Students<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To download NCERT Solutions for Class 7 Maths, Social Science Computer Science, Home Science, Hindi English, Maths Science do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions for Class 7 Maths Exercise 12.1 book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. 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