metric conversions and perimeter review

Choose the best unit of measurement for the length of an ant

• km

• m

• cm

• mm

Choose the best unit of measurement for the distance from London to Toronto.

• mm

• cm

• km

• m

1 cm = (a)   mm?

(a)   cm = 40 mm?

100 cm = (a)   m?

35mm= (a)   cm?

4500 m = (a)   km?

4 km = (a)   m?

4133 m = (a)   km?

The prefix "milli" means 1,000. So a millimetre is:

• 10 times smaller as a metre

• 1,000 times bigger than a metre

• the same size as a metre

• 1,000 times smaller than a metre