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Example 3: Add 35 kg 780 g, 64 kg 85 g and 9 kg 8 g.

Solution: Arrange the given measures in the two columns of ‘kg’ and ‘g’ correctly. Now,
add as ordinary numbers.
Step 1: Add grams. kg g

780 g + 85 g + 8 g = 873 g 1 1 1

Write 873 under the g column. 3 5 7 8 0
Step 2: Add kilograms. 6 4 0 8 5

35 kg + 64 kg + 9 kg = 108 kg + 9 0 0 8
Write 108 under the kg column. 1 0 8 8 7 3

Thus, 35 kg 780 g + 64 kg 85 g + 9 kg 8 g = 108 kg 873 g

Think and Answer
A space suit that astronauts wear in space has helmet, hand
gloves, jacket, socks, etc. The weight of each component is given
in the picture alongside.
1. What is the weight of a space suit without an oxygen cylinder?
______________________
2. What is the weight of a space suit with an oxygen cylinder?
______________________

Knowledge Desk
1
The weight on the Moon of an object is th the weight of the object on the Earth.
6

addition of CaPaCity

If the units in the numbers to be added are the same, then simply add the numbers and
write the unit.

Example 1: Find: (a) 56 L + 12 L. (b) 735 mL + 605 mL.

Solution: (a) 5 6 L (b) 1

+ 1 2 L 7 3 5 mL
6 8 L + 6 0 5 mL

1 3 4 0 mL = 1000 mL + 340 mL

Thus, 56 L + 12 L = 68 L Thus, 735 mL + 605 mL = 1 L 340 mL

When the given capacities are a combination of two units, we arrange them in their
respective columns and then add them.

160 Mathematics-3