Metric and imperial: same amount, different numbers

Mathematics · Measurement · ages 9-10

Name ______________________ Date ____________

About how many pounds equal 1 kilogram?
- 1 pound
- 2.2 pounds
- 5 pounds
1 kg is about 2.2 pounds. About how many pounds are in 5 kg?
- 11 pounds
- 7.2 pounds
- 10 pounds
- 2.7 pounds
About how many centimetres are in 6 inches? Use 1 inch is about 2.5 cm.
Answer: ______________
About how many centimeters equal 1 inch?
- 1 cm
- 2.5 cm
- 10 cm
About how many pints are in 8 litres? Use 1 litre is about 1.75 pints.
Answer: ______________
1 litre is about 1.75 pints. About how many pints are in 4 litres?
- 5.75 pints
- 8 pints
- 4.75 pints
- 7 pints
About how many pounds are in 10 kg? Use 1 kg is about 2.2 pounds.
Answer: ______________
A jug holds 2 litres of water. About how many pints is that?
- about 7 pints
- about 2 pints
- about 3.5 pints
Mia says a 5-inch pencil is about 5 cm long. What mistake did she make?
- She forgot to convert and kept the same number
- She multiplied by 2.5 twice
- She mixed up inches with pounds
A jug holds 6 litres. About how many pints is that? Use 1 litre is about 1.75 pints.
Answer: ______________

Answer key

For grown-ups. Fold this page away before handing over the rest.

2.2 pounds · 1 kilogram weighs about 2.2 pounds.
11 pounds · 5 x 2.2 = 11 pounds.
15 · 6 x 2.5 = 15 cm.
2.5 cm · 1 inch is about 2.5 cm, a bit longer than 2 cm.
14 · 8 x 1.75 = 14 pints.
7 pints · 4 x 1.75 = 7 pints.
22 · 10 x 2.2 = 22 pounds.
about 3.5 pints · 2 times 1.75 is 3.5 pints.
She forgot to convert and kept the same number · 5 inches is about 5 times 2.5, which is 12.5 cm. Mia just kept the number 5 instead of converting it.
10.5 · 6 x 1.75 = 10.5 pints.