Understand the rule first
Write the conversion fact first, then decide whether the number should become larger or smaller. Convert every quantity to one unit before calculating.
Measures & unit conversion 11+ practice
Convert metric measures and combine quantities in a common unit.
Convert 3.45 metres to centimetres.
- One metre equals 100 centimetres.
- Multiply 3.45 by 100.
- 3.45 m = 345 cm.
A common misconception
Multiplying or dividing by 10 regardless of the actual relationship between the units.
Reusable method: Write the conversion fact before multiplying or dividing.Question 1 of 8 MathscoreConvert 2.35 m to centimetres.
- A23.5 cm
- B235 cm
- C2,350 cm
- D0.0235 cm
Need a hint?
Multiply metres by 100.
Show worked answer
Answer B: 235 cm
2.35 × 100 = 235 cm.
Quick method: Write the conversion fact before multiplying or dividing.
Question 2 of 8 MathscoreWhat is 1.8 kg + 650 g, written in grams?
- A1,865 g
- B2,350 g
- C2,450 g
- D6,518 g
Need a hint?
Convert 1.8 kg to grams before adding.
Show worked answer
Answer C: 2,450 g
1.8 kg = 1,800 g; 1,800 + 650 = 2,450 g.
Quick method: Write the conversion fact before multiplying or dividing.
Question 3 of 8 MathscoreHow many 250 ml glasses can be filled completely from 3.5 litres?
- A7
- B10
- C12
- D14
Need a hint?
Convert litres to millilitres, then divide.
Show worked answer
Answer D: 14
3.5 litres = 3,500 ml; 3,500 ÷ 250 = 14.
Quick method: Write the conversion fact before multiplying or dividing.
Question 4 of 8 Mathsexam-styleA 4.2 km route is shortened by 750 m. What is the new length?
- A3.45 km
- B3.55 km
- C4.125 km
- D4.95 km
Need a hint?
Write 750 m as 0.75 km.
Show worked answer
Answer A: 3.45 km
4.2 − 0.75 = 3.45 km.
Quick method: Write the conversion fact before multiplying or dividing.
Question 5 of 8 Mathsexam-styleA rectangle is 2.4 m long and 75 cm wide. What is its area in cm²?
- A1,800 cm²
- B18,000 cm²
- C180 cm²
- D180,000 cm²
Need a hint?
Convert 2.4 m to 240 cm before multiplying.
Show worked answer
Answer B: 18,000 cm²
240 × 75 = 18,000 cm².
Quick method: Write the conversion fact before multiplying or dividing.
Question 6 of 8 Mathsexam-styleConvert 0.85 km to metres.
- A85 m
- B850 m
- C8,500 m
- D0.00085 m
Need a hint?
One kilometre is 1,000 metres.
Show worked answer
Answer B: 850 m
0.85 × 1,000 = 850 m.
Quick method: Write the conversion fact before multiplying or dividing.
Question 7 of 8 Mathsexam-styleWhat is 2 litres 350 ml, written in millilitres?
- A235 ml
- B2,035 ml
- C2,350 ml
- D23,500 ml
Need a hint?
Convert the two litres before adding 350 ml.
Show worked answer
Answer C: 2,350 ml
2 litres = 2,000 ml; 2,000 + 350 = 2,350 ml.
Quick method: Write the conversion fact before multiplying or dividing.
Question 8 of 8 Mathsexam-styleA 4.5 kg sack is divided into 750 g portions. How many portions are made?
- A4
- B5
- C8
- D6
Need a hint?
Convert 4.5 kg to grams, then divide.
Show worked answer
Answer D: 6
4.5 kg = 4,500 g; 4,500 ÷ 750 = 6.
Quick method: Write the conversion fact before multiplying or dividing.