Page 177 - Math Genius C4

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\\October 12, 2025 9:50 AM Bharat Arora P-9 Reader _________________________ Date: ___________________74

3. Convert the following.
(a) 9000 g into kg (b) 4323 g into kg and g

(c) 3065 g into kg and g (d) 25605 mg into g and mg
4. Convert the following.

(a) 14 tons into quintals (b) 125 quintals into kg

(c) 1200 quintals into tons (d) 13 tons 8 quintals into kg

Addition And SubtrAction of weightS

We first arrange the given measurements of weight in columns of appropriate units
and then add or subtract column-wise.

Example 1: Add the following:
(a) 38 kg 278 g and 56 kg 783 g
(b) 8 kg 270 g 875 mg and 14 kg 186 g 68 mg

Solution: (a) kg g (b) kg g mg

1 1 1 1 1 1 1 1

3 8 2 7 8 8 2 7 0 8 7 5
+ 5 6 7 8 3 + 1 4 1 8 6 0 6 8
9 5 0 6 1 2 2 4 5 6 9 4 3

Thus, 38 kg 278 g + 56 kg 783 g Thus, 8 kg 270 g 875 mg + 14 kg 186 g

= 95 kg 61 g. 68 mg = 22 kg 456 g 943 mg.

Example 2: Subtract the following:
(a) 15 kg 783 g from 23 kg 370 g

(b) 6 kg 486 g 865 mg from 15 kg 600 g 20 mg
Solution: (a) kg g (b) kg g mg

12 12 16 9 9 9 11

1 2 2 6 10 15 5 10 10 10 1 10
2 3 3 7 0 1 5 6 0 0 0 2 0
– 1 5 7 8 3 – 6 4 8 6 8 6 5
7 5 8 7 9 1 1 3 1 5 5

Thus, 23 kg 370 g – 15 kg 783 g Thus, 15 kg 600 g 20 mg – 6 kg 486 g
= 7 kg 587 g. 865 mg = 9 kg 113 g 155 mg.

Example 3: The total weight of three friends, Rohan, Rehan and Vivan is 108 kg. If
Rohan’s weight is 37 kg 250 g and Rehan’s weight is 38 kg 550 g, what is Vivan’s
weight?

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