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Example 3: Add 35 kg 780 g, 64 kg 85 g and 9 kg 8 g. Example 2: Add 56 L 346 mL and 71 L 465 mL.

Solution: Arrange the given measures in the kg and g columns correctly. Now, add Solution: Arrange the given measures in the two columns of L and mL and add them.
them. Step 1: Add millilitres. 346 mL + 465 mL = 811 mL L mL
Step 1: Add grams. kg g Write 811 under the mL column. 1 1 1

780 g + 85 g + 8 g = 873 g 1 1 1 5 6 3 4 6

Write 873 under the g column. 3 5 7 8 0 Step 2: Add litres. 56 L + 71 L = 127 L + 7 1 4 6 5
Step 2: Add kilograms. 6 4 0 8 5 Write 127 under the L column. 1 2 7 8 1 1

35 kg + 64 kg + 9 kg = 108 kg + 9 0 0 8 Thus, 56 L 346 mL + 71 L 465 mL = 127 L 811 mL
Write 108 under the kg column. 1 0 8 8 7 3 Example 3: Find the sum of 72 L 360 mL and 64 L 950 mL.

Thus, 35 kg 780 g + 64 kg 85 g + 9 kg 8 g = 108 kg 873 g Solution: Step 1: Add millilitres and convert the sum into litres and millilitres.

360 + 950 = 1310 mL = 1000 mL + 310 mL
Think Tank Logical Thinking
= 1 L 310 mL
Cross-Curricular Learning
An astronaut's space suit has a helmet, gloves, jacket, socks, and
more. The astronaut also carries an oxygen cylinder when in space Write 310 under mL column and carry forward 1 to L column.
outside the spaceship. The weight of each part is shown in the picture. Step 2: Add litres. L mL
1. What is the weight of a space suit without an oxygen cylinder?
______________________ 1 L (carried forward) + 72 L + 64 L = 137 L 1 1
2. What is the weight of a space suit with an oxygen cylinder? Write 137 under L column. 7 2 3 6 0
______________________ + 6 4 9 5 0
Thus, 72 L 360 mL + 64 L 950 mL = 137 L 310 mL.
1 3 7 3 1 0
Knowledge Desk Think Tank

1
The weight of an object on the Moon is th the weight of the object on the Earth. Critical Thinking
6 Kritika said that units of length, weight or capacity must be the same before adding
and subtracting them. Do you agree with her?
addition of CaPaCity

If the units of the numbers to be added are the same, then add the numbers and write Practice time 9d

the unit. 1. Add the following.

Example 1: Find: (a) 56 L + 12 L. (b) 735 mL + 605 mL. (a) m cm (b) m cm (c) km m
Solution: (a) 5 6 L (b) 1 7 1 4 6 1 4 8 4 8 1 6 8 1 6 6

+ 1 2 L 7 3 5 mL + 2 1 4 3 + 1 9 5 3 9 + 2 1 4 5 4 7

6 8 L + 6 0 5 mL

1 3 4 0 mL = 1000 mL + 340 mL (d) kg g (e) L mL (f) L mL

Thus, 56 L + 12 L = 68 L Thus, 735 mL + 605 mL = 1 L 340 mL 4 6 0 6 1 0 6 9 0 0 9 5 0 6 0 4 5
When the given capacities are a combination of two units, we arrange them in their + 5 1 8 7 1 4 + 1 0 4 3 0 4 + 4 5 6 3 7 9

respective columns and then add them.

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