Page 134 - Maths Skill - 3

132 Maths

In the most common balance, the weighing bars of the following denominations are used.

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

Conversion of Weight

1 kilogram = 1000 grams

� To convert kilograms into grams, multiply the number of kilograms by 1000.

� To convert grams into kilograms, divide the number of grams by 1000.

Let’s Attempt

Example 1: Convert 8 kg and 15 kg into g. Example 2: Convert 8000 g into kg.

Solution: 8 kg = (8 × 1000) g = 8000 g Solution: 8000 g = (8000 ÷ 1000) kg

15 kg = (15 × 1000) g = 15000 g = 8 kg

Example 3: Convert 6 kg 70 g into g.

Solution: 6 kg 70 g = (6 × 1000) g + 70 g Challenge

= 6000 g + 70 g = 6070 g I’m a tool quite neat, I’ll show you
measure.
Example 4: Convert 4789 g into kg and g. Two sides I have, balanced I stay,
To compare weights, I’m used every day.
Solution: 4789 g = 4000 g + 789 g Put objects on me, I’ll give you the keys.

= (4000 ÷ 1000) kg + 789 g Balance is my game. What am I?

= 4 kg + 789 g = 4 kg 789 g

Exercise 10.4

1. Write the suitable unit as ‘kg’ or ‘g’ for measuring the weight of:

(a) your bag (b) a football (c) a bag of wheat

(d) a candy (e) yourself (f) a potato

2. Convert the following into grams.

(a) 7 kg (b) 6 kg 50 g (c) 4 kg 991 g

3. Convert the following into ‘kg’ and ‘g’.

(a) 7000 g (b) 8025 g (c) 3007 g