Page 164 - ICSE Math 5

2. Convert the following as directed and express the answer in decimals.

(a) 6 kL 7 hL 9 daL 4 L to kL (b) 3 L 6 dL 7cL 4 mL to L
(c) 27 kL 7 hL to kL (d) 9 L 2 cL to L

(e) 9 kL 7 daL to kL (f) 45 L 47 mL to L

3. Express the given measures in litres (L) using decimal notation.

(a) 7 cL 4 mL (b) 6 L 2 mL (c) 19 L 2 cL 1 mL

(d) 7 dL 2 cL 1 mL (e) 2 cL 3 mL (f) 14 cL 21 mL
(g) 29 L 3 cL 4 mL (h) 18 dL 4 cL 9 mL

Four Basic Operations on Metric Measures

We have already learnt addition and subtraction of length, weight and capacity. Now, we also
know how to convert metric measures to decimal form and perform calculations. Let’s revise the
addition and subtraction of metric measures with the help of some examples.

Example 9: Add 5 km 3 hm 7 dam 9 m, 4 km 6 hm 1 m and 2 hm 8 m.

Solution: Express the given measures in kilometres using decimal notation.

1 1
5 km 3 hm 7 dam 9 m = 5 . 3 7 9 km
4 km 6 hm 0 dam 1 m = 4 . 6 0 1 km

0 km 2 hm 0 dam 8 m = + 0 . 2 0 8 km
1 0 . 1 8 8 km

So, the sum obtained is 10.188 km which can also be written as 10 km 1 hm
8 dam 8 m.

Example 10: Subtract 32 m 82 cm from 84 m 67 cm and express the answer in metres.

Solution: Express the given measures in metres using decimal notation.
3 16
84 m 67 cm = 8 4 . 6 7 m
32 m 82 cm = – 3 2 . 8 2 m
5 1 . 8 5 m

So, the difference obtained is 51.85 m.
Now let’s learn multiplication and division of metric measures.

To multiply or divide the given measure, we first convert it in decimal form and then perform
calculations. Multiplication and division of metric measures (in decimal form) is similar to that of
whole numbers with a difference that the decimal point is placed appropriately in the product
and quotient obtained.

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