Page 123 - Math Skill - 5

Measurement 121

To convert from higher units to lower units, we multiply by 10 or 100 or 1000.

milli centi deci metre/gram litre deca hecto kilo

× 10 × 10 × 10 × 10 × 10 × 10

1 m = 10 dm 1 m = 100 cm 1 m = 1000 mm
1 1 1
1 m = dam 1 m = hm 1 m = km
10 100 1000

Similarly, we can follow the conversions for gram and litre too.

1 kg = 1000 g 1 hg = 100 g 1 dag = 10 g

1 1 1
1 dg = g = 0.1 g 1 cg = g = 0.01 g 1 mg = g = 0.001 g
10 100 1000

1 kL = 1000 L 1 hL = 100 L 1 daL = 10 L

1 1 1
1 dL = L = 0.1 L 1 cL = L = 0.01 L 1 mL = L = 0.001 L
10 100 1000

Fact-o-meter Challenge

� Conversion from higher to lower units, we multiply. “I measure liquids or sometimes space,
� Conversion from lower to higher units, we divide. In a container, I find my place.

Whether it’s water, milk, or oil,
I help to measure without any toil.
Let us learn through examples. What am I?

Let’s Attempt

Example 1: Convert the following as directed.
(a) 2 dm to mm (b) 5000 dag to kg

Solution: (a) 1 dm = 100 mm (b) 1 dag = 1 kg

2 dm = 2 × 100 = 200 mm 100

5000 dag = 5000 kg = 50 kg.
100
Example 2: Do the following conversions.
(a) 55 cm into m (b) 25 mg into g

(c) 4.15 m into mm (d) 60 mL into L