Measuring length and height using cm and mm | Exit Quiz | Oak National Academy

Which of the following would be good to measure in millimetres (mm)?

• Height of a door

• Length of a bus

• Width of a pencil

Answer explanation

Correct! We can measure anything in mm but there would be a lot of mm in the length of a bus or the height of a door.

Match the unit of measure to its abbreviation.

• Millimetre

• m

• Centimetre

• mm

• Metre

• cm

Answer explanation

Well done! We can abbreviate units of measure to make text easier to read. These abbreviations are universally understood.

What number of mm is the arrow pointing to?

(a)  

Answer explanation

Correct! The arrow is pointing to the mark after the 5 mm mark. The arrow is pointing to 6 mm.

What is the length of this leaf in mm?

(a)  

Answer explanation

Well done! The length of the leaf is 34 mm. The leaf is lined up with zero and 34 mm is the numerical value at its end.

What is the length of this ribbon in mm?

• 30 mm

• 55 mm

• 85 mm

Answer explanation

Excellent! The ribbon was not lined up with the zero, so we had to find the difference.

Give the height of this cake in whole cm and mm.

(a)  

Answer explanation

Well done! The cake is 4 mm taller than 3 cm so we say that the height of the cake is 3 cm 4 mm.