Turning big units into small ones

Mathematics · Measurement · ages 9-10

Name ______________________ Date ____________

Express 2 kg 350 g in grams.
Answer: ______________
How many metres are in 3.5 km?
- 350 m
- 3050 m
- 35000 m
- 3500 m
How many millimetres are in 2 cm?
- 2 mm
- 20 mm
- 200 mm
- 12 mm
How many millimeters make 1 centimeter?
- 10
- 100
- 1,000
A bag of rice weighs 2 kg 350 g. Written only in grams, how much is that?
- 2,350 g
- 2,035 g
- 235 g
Leo says 5 cm equals 50 mm because 1 cm equals 10 mm. Is Leo right?
Circle one: True False
How many millilitres are in 3 litres?
- 300 mL
- 30 mL
- 3000 mL
- 30000 mL
How many millimetres are in 7 cm?
Answer: ______________
Ben converts 4.2 km to meters and writes 420 m. What went wrong?
- He multiplied by 100 instead of 1,000
- He added instead of multiplying
- He forgot to convert at all
One bottle holds 1 l 250 ml of juice. Two bottles hold how many ml in total?
Answer: ______________

Answer key

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

2350 · 2 kg 350 g = 2350 g.
3500 m · 3.5 x 1000 = 3500 m.
20 mm · 2 x 10 = 20 mm.
10 · A centimeter equals 10 millimeters, the smallest jump you'll use in this table.
2,350 g · 2 kg is 2,000 g. Add the extra 350 g: 2,000 plus 350 makes 2,350 g.
True · Leo is right: 5 x 10 = 50 mm.
3000 mL · 3 x 1000 = 3000 mL.
70 · 7 x 10 = 70 mm.
He multiplied by 100 instead of 1,000 · Converting km to m means multiplying by 1,000. 4.2 times 1,000 is 4,200 m, not 420 m.
2500 · 1 l 250 ml is 1,000 ml plus 250 ml, which is 1,250 ml. Two bottles double that to 2,500 ml.