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NCERT Solutions for Class 7 Maths Exercise 2.3

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NCERT Solutions for Class 7 Maths Exercise 2.3 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.

NCERT solutions for Maths Fractions and Decimals Download as PDF

NCERT Solutions for Class 7 Maths Exercise 2.3

NCERT Solutions for Class 7 Maths Fractions and Decimals

Class –VII Mathematics (Ex. 2.3)
Question 1.Find:

(i) 14 of

(a) 14

(b) 35

(c) 43

(ii) 17 of

(a) 29

(b) 65

(c) 310

Answer:

(i)

(a) 14 of 14 = 14×14=1×14×4=116

(b) 14 of 35 = 14×34=1×34×4=316

(c) 14 of 43 = 14×43=1×44×3=13

(ii)

(a) 17 of 29 = 17×29=1×27×9=263

(b) 17 of 29 = 17×65=1×67×5=635

(c) 17 of 29 = 17×310=1×37×10=370


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 2.Multiply and reduce to lowest form (if possible):

(i) 23×223

(ii) 27×79

(iii) 38×64

(iv) 95×35

(v) 13×158

(vi) 112×310

(vii) 45×127

Answer:

(i) 23×223=23×83=2×83×3=169=179

(ii) 27×79=2×77×9=29

(iii) 38×64=3×68×4=3×38×2=916

(iv) 95×35=9×35×5=2725=1225

(v) 13×158=1×153×8=1×51×8=58

(vi) 112×310=11×32×10=3320=1320

(vii) 45×127=4×125×7=4835=11335


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 3.Multiply the following fractions:

(i) 25×514

(ii) 625×79

(iii) 32×513

(iv) 56×237

(v) 325×47

(vi) 235×3

(vii) 347×35

Answer:

(i) 25×514=25×214=2×215×4=1×215×2=2110=2110

(ii) 625×79=325×79=32×75×9=22445=44445

(iii) 32×513=32×163=486=8

(iv) 56×237=56×177=8542=2142

(v) 325×47=177×47=6835=13335

(vi) 235×3=135×31=13×35×1=395=745

(vii) 347×35=257×35=5×37×1=157=217


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 4.Which is greater:

(i)27 of 34 or 35 of 58

(ii)12 of 67 or 23 of 37

Answer:

(i) 27 of 34 or 35 of 58 27 x 34 or 35 x 58

314 or 38 314<38

Thus, 35 of 58 is greater.

(ii) 12 of 67 or 23 of 37 12 x 67 or 23 x 37

37 or 27 37>27

Thus, 12 of 67 is greater.


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 5.Saili plants 4 saplings in a row in her garden. The distance between two adjacent saplings is 34 m. Find the distance between the first and the last sapling.

Answer:

The distance between two adjacent saplings = 34 m

Saili planted 4 saplings in a row, then number of gap in saplings

Therefore, the distance between the first and the last saplings = 3×34 = 94 m = 214 m

Thus the distance between the first and the last saplings is 214 m.


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 6.Lipika reads a book for 134 hours everyday. She reads the entire book in 6 days. How many hours in all were required by her to read the book?

Answer:

Time taken by Lipika to read a book = 134 hours.

She reads entire book in 6 days.

Now, total hours taken by her to read the entire book = 134×6 = 74×6=212=1012 hours

Thus 10 hours were required by her to read the book.


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 7.A car runs 16 km using 1 litre of petrol. How much distance will it cover using 234 litres of petrol?

Answer:

In 1 litre of pertrol, car covers the distance = 16 km

In 234 litres of petrol, car covers the distance = 234 of 16 km = 114×16 = 44 km

Thus, car will cover 44 km distance.


NCERT Solutions for Class 7 Maths Exercise 2.3

Question 8.(a) (i) Provide the number in the box  , such that 23× =1030.

(ii) The simplest form of the number obtained in   is __________.

(b) (i) Provide the number in the box  , such that 35× =2475.

(ii) The simplest form of the number obtained in   is __________.

Answer:

(a)

(i) 23×510=1030

(ii) The simplest form of 510 is 12.

(b)

(i) 35×815=2475

(ii) The simplest form of 815 is 815.

NCERT Solutions for Class 7 Maths Exercise 2.3

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