Free practice on Metric System for Class 4, following the Cameroon primary school curriculum (English subsystem). Every answer is explained, so a parent who is not sure of the answer can still help.
Each unit is 10 times the one below. 1 cm = 10 mm. 1 dm = 10 cm = 100 mm. 1 m = 10 dm = 100 cm = 1000 mm. 1 km = 1000 m.
| Big → small | × |
|---|---|
| 1 km = 1000 m | × 1000 |
| 1 m = 10 dm | × 10 |
| 1 m = 100 cm | × 100 |
| 1 cm = 10 mm | × 10 |
Capacity uses ml, cl, dl, litres. 1 litre = 1000 ml. 1 cl = 10 ml. Weight uses grams and kilograms. 1 kg = 1000 g.
| Measurement | Small → big |
|---|---|
| Length | mm → cm → dm → m → km |
| Capacity | ml → cl → dl → l |
| Weight | g → kg → tonne |
To go from big to small: MULTIPLY. From small to big: DIVIDE. Example: 2.5 km to metres = 2.5 × 1000 = 2500 m. Or 4500 g to kg = 4500 ÷ 1000 = 4.5 kg.
How many centimetres are in 1 metre?
Write your answer, then check below.
Answer: 100
Convert 3 km to metres.
Write your answer, then check below.
Answer: 3000
1 km = 1000 m.
How many millimetres are in 5 cm?
Write your answer, then check below.
Answer: 50
1 cm = 10 mm.
Convert 2 kg to grams.
Write your answer, then check below.
Answer: 2000
1 kg = 1000 g.
How many centilitres are in 1 litre?
Write your answer, then check below.
Answer: 100
Which unit is best for measuring the distance from Douala to Yaoundé?
Answer: D. kilometres
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