Primary 3 Math - How good is your estimation of length?

Which one of the following would be the most likely height of the door to your classroom?

• 2 m

• 2 cm

• 20 m

• 20 cm

The height of your classroom desk would be the most likely be _________.

• 70 m

• 7 m

• 7 cm

• 70 cm

Samy lives in a 4-storey block. A tree is almost as tall as Samy's block. Which one of the following would most likely be the height of the tree?

• 5 cm

• 15 cm

• 15 m

• 5 m

The length of a bus is about _______.

• 120 m

• 120 cm

• 12 m

• 12 cm

The width of your Math Activity Book is about _______.

• 22 m

• 22 cm

• 2 m

• 2 cm

The width of my fingernail is about _________.

• 1 cm

• 1 m

• 10 cm

• 10 m

To reduce the spread of COVID-19, we have to exercise safe distancing of at least 2 arms' length from other people. How far is that?

• 2 cm

• 2 m

• 20 cm

• 20 m