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Example 3: Subtract 18 kg 628 g from 29 kg 76 g.
Think Tank Logical Thinking
Solution: Arrange the given measures in the kg and g columns such that the smaller
Sania’s family wants to go to the shopping mall
by the shortest route. The picture shows the weight is written below the bigger weight. Then subtract them.
distance between the places using two different Step 1: Subtract ‘g’.
routes.
We cannot subtract 628 g from 76 g as 76 < 628.
1. Which route should they take: home to
shopping mall via the temple or home to So, we borrow 1 kg from 29 kg, leaving behind 28 kg.
shopping mall via the bank? Now 1 kg 76 g = 1076 g

______________________ And 1076 g – 628 g = 448 g kg g
2. How much more distance will they cover if
they take the longer route? Write 448 under the g column. 8 10 6 16
______________________ Step 2: Subtract ‘kg’. 2 9 0 7 6

28 kg – 18 kg = 10 kg – 1 8 6 2 8
1 0 4 4 8
Subtraction of WeightS Write 10 under the kg column.
Thus, 29 kg 76 g – 18 kg 628 g = 10 kg 448 g
Example 1: Subtract:

(a) 350 g from 900 g (b) 17 kg from 30 kg Subtraction of capacitieS

Solution: (a) 8 10 (b) 2 10 Example 1: Subtract the following:
(a) 550 mL – 275 mL (b) 248 L – 198 L
9 0 0 g 3 0 kg
– 3 5 0 g – 1 7 kg Solution: (a) 14 (b) 1 14

5 5 0 g 1 3 kg 4 4 10 2 4 8 L
5 5 0 mL – 1 9 8 L
Example 2: Subtract 14 kg 569 g from 21 kg 664 g. – 2 7 5 mL 5 0 L

Solution: Write the given measures in the kg and g columns such that the smaller 2 7 5 mL
weight is written below the bigger weight. Then subtract them. Example 2: Subtract 15 L 346 mL from 20 L 940 mL.

Step 1: Subtract grams (g). kg g Solution: Arrange the given measures in the L and mL columns and then subtract.

664 g – 569 g = 95 g 15 Step 1: Subtract the millilitres. L mL
1 11 5 5 14
Write 95 under the g column. 2 1 6 6 4 940 mL – 346 mL = 594 mL 1 10 8 13
3 10
Step 2: Subtract kilograms (kg). – 1 4 5 6 9 Write 594 under the ml column. 2 0 9 4 0
7 0 9 5 Step 2: Subtract the litres.
21 kg – 14 kg = 7 kg – 1 5 3 4 6
20 L – 15 L = 5 L 5 5 9 4
Write 7 under the kg column.
Write 5 under the L column.
Thus, 21 kg 664 g – 14 kg 569 g = 7 kg 95 g Thus, 20 L 940 mL – 15 L 346 mL = 5 L 594 mL.

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