A millimetre is a standardised unit of measurement.  We can abbreviate millimetre to mm.

Millimetres as a unit of measure and the relationship between them and cm

Maths

In this unit pupils will continue to measure using appropriate tools and units progressing to using a wider range of measures including comparing and using mixed units In the future unit pupil will learn perimeter as the distance around the edge of a 2D shape They will learn perimeter is measured in units of length found by counting units and by calculating by adding the side lengths of a 2D shape

In the prior unit pupils chose, used and compared appropriate standard units to estimate and measure length/height, mass, temperature, capacity to the nearest appropriate unit. In this unit pupils will continue to measure using appropriate tools and units progressing to using a wider range of measures, including comparing and using mixed units.

Measuring length and recording in tables

Which unit of measurement is represented by the shading and arrow in this image?

Which of these objects would you measure in millimetres?

Which is smaller, one centimetre or one millimetre?

Is the pebble shorter or longer than 1 cm?

Starting with the shortest, put these measurements in order of length.

A piece of string is 90 mm long.  2 cm is cut off.  What is the length of the piece of string now?

I have a piece of ribbon that is 80 cm long.  Is this ribbon shorter or longer than one metre?

Which unit would you use to measure the length of a swimming pool?

If one metre is equal to 100 cm, how many cm are 6 metres equal to?

Convert the height of this house from centimetres to metres.

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