Page 145 - ICSE Math 4

Exercise 11.4

1. Convert the following to grams.

(a) 54 kg (b) 345 kg (c) 63 kg 876 g (d) 96 kg 5 g
(e) 14 kg 56 g (f) 9 kg 601 g (g) 16 kg 324 g (h) 84 kg 104 g

2. Convert the following to kilograms or kilograms and grams.

(a) 5,000 g (b) 30,000 g (c) 31,980 g (d) 28,715 g

(e) 4,355 g (f) 5,061 g (g) 67,214 g (h) 8,098 g

Addition and Subtraction of Weights

We add or subtract weights in the same way as we add or subtract the lengths.

Example 15: Add the following weights. Example 16: Subtract the following
23 kg 245 g, 38 kg 325 g and weights.
17 kg 461 g 643 kg 521 g from 800 kg

Solu on: kg g Solu on: kg g

1 1 1 1 9 9 10
9
9
7
2 3 2 4 5 8 0 0 10 10 0
0 0 0
3 8 3 2 5 – 6 4 3 5 2 1
+ 1 7 4 6 1 1 5 6 4 7 9
7 9 0 3 1
The diff erence between the
The sum of the given weights given weights is 156 kg 479 g.
is 79 kg 31 g.
Example 17: Ananya has two bags of wheat weighing 2 kg 230 g and 4 kg 720 g, respec vely.
What is the total weight of the two bags? What will be the total weight of the
bags if 2 kg wheat is used?
Calcula ons
Solu on: Weight of the fi rst bag = 2 kg 230 g kg g
Weight of the second bag = 4 kg 720 g 2 2 3 0

 Total weight of bags = 2 kg 230 g + 4 kg 720 g + 4 7 2 0

= 6 kg 950 g 6 9 5 0
So, the total weight of the two bags is 6 kg 950 g. kg g
Thus, the weight of the bags when 2 kg wheat 6 9 5 0

is used = 6 kg 950 g – 2 kg = 4 kg 950 g – 2 0 0 0
So, the total weight of the bags will be 4 kg 950 g 4 9 5 0
if 2 kg wheat is used.
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