Page 161 - ICSE Math 5

2. Express the given measures in metres (m) using decimal notation.
(a) 6 m 32 cm (b) 40 cm (c) 98 cm (d) 8 m 6 cm
(e) 14 m 42 cm (f) 32 m 14 cm (g) 11 m 39 cm (h) 24 m 19 cm

3. Express the given measures in kilometres (km) using decimal notation.

(a) 6 km 4 hm 2 dam 7 m (b) 33 km 9 hm (c) 9 m
(d) 840 km 9 dam (e) 12 km 6 m (f) 14 km 7 dam

4. Convert the following as directed.

(a) 12 km 3 hm 2 dam 4 m to km (b) 9 m 5 dm 6 cm 2 mm to m
(c) 5 dam 1 m to dam (d) 6 dm 4 cm 3 mm to dm
(e) 5 m 8 mm to m (f) 6 cm 8 mm to cm

(g) 2 km 3 m to km (h) 72 km 3 dam 6 m to km

5. Express the following as directed.
(a) 10.24 cm in dm and m (b) 46.378 mm in cm and m
(c) 0.7 dm in cm and mm (d) 3.008 km in hm, dam and m

(e) 1.412 km in m (f) 0.5 km in hm and cm
(g) 7.45 mm in cm and dm (h) 45.534 km in dam and m

Weight

Just like length, weight also has a standard unit of measurement, i.e., gram (g). The units of
weight can also be converted from larger to smaller units and vice versa.

Look at the table given below. It shows how to change the units of weight from larger units to
smaller units and vice versa.
Multiply by 10 to go to a smaller unit.

 10  10  10  10  10  10
kilogram hectogram decagram gram decigram centigram milligram
(kg) (hg) (dag) (g) (dg) (cg) (mg)
1 1 1 1 1 1
     
10 10 10 10 10 10

1
Multiply by (or divide by 10) to go to a bigger unit.
10

Expressing weight in decimal form

Since 1 kg = 1,000 g, we can write 1 g = 1 kg = 0.001 kg.
1000

Similarly, 1 g = 1,000 mg and we can write 1 mg = 1 g = 0.001 g.
1000
Let’s learn the conversion of units of weight from larger to smaller units and vice versa through
examples.

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