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Example 2: Add 56 L 346 mL and 71 L 465 mL.

Solution: Arrange the given measures in the two columns of L and mL and add them.

Step 1: Add millilitres. 346 mL + 465 mL = 811 mL L mL

Write 811 under the mL column. 1 1 1
Step 2: Add litres. 56 L + 71 L = 127 L 5 6 3 4 6

+ 7 1 4 6 5
Write 127 under the L column.
1 2 7 8 1 1
Thus, 56 L 346 mL + 71 L 465 mL = 127 L 811 mL

Example 3: Find the sum of 72 L 360 mL and 64 L 950 mL.

Solution: Step 1: Add millilitres and convert the sum into litres and millilitres.

360 + 950 = 1310 mL = 1000 mL + 310 mL

= 1 L 310 mL
Write 310 under mL column and carry forward 1 to L column.

Step 2: Add litres. L mL

1 L (carried forward) + 72 L + 64 L = 137 L 1 1

Write 137 under L column. 7 2 3 6 0
Thus, 72 L 360 mL + 64 L 950 mL = 137 L 310 mL. + 6 4 9 5 0
1 3 7 3 1 0

Think and Answer
Kritika said that units of lengths, weights or capacities must be the same before
adding and subtracting them. Do you agree with the statement given by Kritika?

Practice time 9d

1. Add the following.

(a) m cm (b) m cm (c) km m

7 1 4 6 1 4 8 4 8 1 6 8 1 6 6
+ 2 1 4 3 + 1 9 5 3 9 + 2 1 4 5 4 7

(d) kg g (e) L mL (f) L mL

4 6 0 6 1 0 6 9 0 0 9 7 0 6 0 4 5

+ 5 1 8 7 1 4 + 1 0 4 3 0 4 + 4 5 6 3 7 9

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