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AddITIon And SuBTrACTIon oF MASS

example 1. Add:

a. 44 kg 278 g and 58 kg 783 g

b. 270 g 875 mg and 186 g 68 mg

Solution. Arrange the given measures in columns of appropriate units and add

columnwise.

a. kg g

1
1 1 1
4 4 2 7 8 44 kg 278 g + 58 kg 783 g = 103 kg 61 g

+ 5 8 7 8 3
1 0 3 0 6 1

b. g mg

1
1
1
2 7 0 8 7 5 270 g 875 mg + 186 g 68 mg = 456 g 943 mg
+ 1 8 6 0 6 8

4 5 6 9 4 3

example 2. Subtract:
a. 16 kg 783 g from 22 kg 370 g

b. 486 g 865 mg from 600 g 20 mg

Solution. Arrange the given measures in columns correctly and subtract columnwise.

a. kg g

1 11 12 16 10
2 2 3 7 0 22 kg 370 g – 16 kg 783 g = 5 kg 587 g
– 1 6 7 8 3

5 5 8 7

b. g mg
5 9 9 9 11 10

6 0 0 0 2 0 600 g 20 mg – 486 g 865 mg = 113 g 155 mg
– 4 8 6 8 6 5
1 1 3 1 5 5

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Measurement