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NCERT Solutions for Class 4 Maths Halves and Quarters
Chapter -9 Class 4 Maths Halves and Quarters
1. If the cats ask you to divide the chapati equally how will you divide it?
Ans. To divide the chapatti equally, I will fold it in such a way that one part coincides with the other exactly. These parts will look as shown in the figure.
2. If two or more cats come for food how will you divide one chapati equally for four cats?
Ans. To divide one chapati equally into four parts. I will first divide into two halves. Then. I will fold each half in such a way that one part coincides with the other exactly. These parts will look as under:
3. Half of Many Pieces
Rani got a chocolate. She divided it equally and gave half to her friend Reena.
(a) Circle the portion the Reena got.
Ans. (a) Reena’s portion is shown as encircled:
(b) How many pieces of chocolate are there?
Ans. (b) There are six pieces of chocolate.
(c) How many pieces were left with Rani?
Ans. (c) Three pieces of chocolate were left with Rani.
4. Rajni’s father brought a cake. She divided the cake into 4 equal parts- for herself, her brother Raju, her father and her mother.
(a) Colour each share with different colours.
(b) How much does each get?
Ans. (b) Each gets of the cake.
(c) Out of 4 parts Rajni will get 2 parts. Which is equal to half of the cake. So she can write as or .
(d) Colour the share Raju got.
5. Using a Price List:
(a) How much does kg tomato costs?
Ans. (a) Cost of 1 kg tomato = Rs8
Cost of kg of tomato = Rs = Rs 4
(b) Which costs more kg of onions or kg of carrots.
Ans. (b) Cost of 1 kg of onions = Rs. 10
Cost of kg of onions = Rs. = Rs 5
Cost of 1 kg of carrots = Rs 16
Cost of kg of carrots = Rs. = Rs 4
Since, 5 is more than 4, therefore, cost of kg of onions is more than the cost of kg of onions.
(c) What is the price of kg potato?
Ans. (c) Cost of 1 kg potato = Rs. 12
Cost of kg of potato = Rs 12
= Rs. 9
(d) Keerthi is going for shopping. She has only Rs 20 with her. Can she buy all the things in her shopping list?
Ans. (d) Cost of kg potato = Rs. 8 = Rs. 4
Cost of 2 kg pumpkin = Rs. 4 2 = Rs. 8
Cost of kg carrot = Rs. 16 = Rs. 4
Total cost = Rs. 16
Since, Keerthi has Rs. 20 which are more than Rs. 16, so she can buy all the things in her shopping list.
6. (a) What part of the whole is coloured? Write below each shape.
Ans. is coloured and or is coloured.
(b) Colour that part of the shapes which is written below.
7. Match the colour part as shown.
8. How many centimeters long is the line?
Ans. The line is 50 cm long (because 1 metre = 100 cm)
1 metre = 100 cm
metre = 50 cm 100 = 50
metre = 25 cm 100 = 25
metre = 75 cm 100 = 75
9. (a) How many millimetres of milk does each bottle have?
Ans. (a) Each bottle has = 250 ml of milk.
(b) Shade the level of milk in each bottle.
Ans. (b) The level of milk is shaded as shown in the adjacent figure.
(c) How many milliliter of milk does each bottle hold?
Ans. (c) Milk in the first bottle = 1000 ml = 750 ml
Milk in the first bottle = 1000 ml = 250 ml
10. Choose from the weights above to make the two pans equal. In how many ways you can do it?
Ans. Two pans can be made equal by putting the weights shown in the empty pan in many ways. Some of them are given below:
(i) 1 kg, 500 g, 500 g
(ii) 1 kg, 500 g, 300 g, 200 g
(iii) 1 kg, 500 g, 250 g, 250 g
(iv) 1 kg, 250 g, 250 g, 250 g
(v) 1 kg, 500 g, 200 g, 200 g, 100 g
(vi) 1 kg, 500 g, 250 g, 200 g, 50 g
(vii) 500 g, 500 g, 250 g, 250 g, 250 g, 200 g, 50 g
(viii) 500 g, 500 g, 250 g, 250 g, 200 g, 200 g, 100 g
11.(a) Draw the weights in empty pan. Remember 1 kg = 1000g.
Ans. (a) To balance the two pans, we will put one weight of 1 kg and two weights 500 g in the empty pan.
(b) In how many different ways can you balance this weight of kg?
Ans. (b) Some of weights which can balance kg of weight are as under:
(1) 500 g, 250 g; (2) 250 g, 250 g, 50 g; (3) 250 g, 200 g, 200 g, 100 g.
Class 4 Maths Halves and Quarters
12. Kannan shaded some parts as shown. But his friend Mini says that it wrong. Explain why it is wrong.
Ans. In the case of the rectangle, the four divisions are not of the equal size. So, cannot be said the shaded part is . In case of the triangle, the line is not at the middle.
Clearly, the shaded part is not .
13. There are 60 mangoes. of them are ripe. How many mangoes are ripe?
Ans. Number of mangoes = = 30.
14. There are 32 children. of them are girls. How many children are boys?
Ans. Total number of children = 32
Number of girls = = 16
Thus, number of boys = 32- 16= 16.
Class 4 Maths Halves and Quarters
15. There are 20 stars. A quarter of them are red. How many stars are red. How many are not red?
Ans. Total number of stars = 20
Number of red stars = A quarter of 20 stars
= 20 = 5 stars
Number of non-red stars = 20 – 5 = 15.
16. Ravi wants a pencil. It costs Rs. 2. He gives a one-rupee coin, one half rupee coin and one-quarter rupee coin. Is it enough?
Ans. Cost of a pencil = Rs. 2
Money paid = Re 1.00 + Re 0.50 + Re 0.25 = Rs. 1.75
Since, Rs 2 is more than Rs 1.75, therefore, money paid is not enough.
NCERT solutions for Class 4 Mathematics Chapter 9 Halves and Quarters
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