Thousands in metric units
Today I can use 1000 to convert between metric units, like 2 kg is 2000 g.
A Look back3 min
- 1.
300 + 40 =
- 2.
4 tens is
- 3.
1400 1040
B Watch me, then you4 min
Sam is baking. A bag of flour weighs 2 kg, and the scales show grams too.

1 kg is 1000 g.
2 kg is 1000 g and another 1000 g.
1000 + 1000 = 2000, so 2 kg is 2000 g.
- 1.
1 litre = 1000 ml. A jug holds 3 litres. How many ml is that?
C Your turn6 min
- 1.
1 km = 1000 m. So 2 km = m.
- 2.
1 kg = 1000 g. So 3 kg = g.
- 3.
1 kg = 1000 g. So 4 kg = g.
- 4.
1 kg = 1000 g. So 4000 g = kg.
Say it out loud: What stays the same in the first three rows, and what changes? How is the last row different?
D Spot the mistake3 min

- 1.
How many millimetres are in 1 metre?
E Think deeper4 min
- 1.
A path is 2 km long. Ali has walked 1500 m. How many metres are left?