Page 155 - Math Skill - 2

Measurement 153

Write the unit to weigh the given objects. One has been done for you.

g

Challenge

The following pictures show some of the commonly used weights.

50 g 100 g 200 g 500 g 1 kg 2 kg 5 kg 10 kg

Which weights will be used to form the following weights.

(i) 15 kg = _____ kg + _____ kg (ii) 7 kg = _____ kg + _____ kg

(iii) 13 kg = _____ kg + _____ kg + _____ kg (iv) 3 kg = _____ kg + _____ kg

Adding and Subtracting Weights

To add and subtract different weights, we write weight in columns and

then do the addition or subtraction.

Example 1: Add 235 g and 148 g. Example 2: Subtract 15 kg from 33 kg.

Solution: 1 Solution: 2 13

2 3 5 g 3 3 kg

+ 1 4 8 g – 1 5 kg
3 8 3 g 1 8 kg

Thus, 235 g + 148 g Thus, 33 kg – 15 kg

= 383 g = 18 kg