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## Nuffield Free-Standing Mathematics Activity Measure it!

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**What could you use to measure these?**What units would you use? This activity is about estimating and measuring lengths.**0**60 30 40 50 70 10 20 80 mm 6 3 4 5 7 0 8 2 1 cm 0.4 cm 3.5 cm 6.8 cm 4 mm 68 mm 35 mm**6**3 4 5 7 0 8 2 1 cm D H C E G B A F Write these measurements in centimetresandmillimetres: A = 1.5 cm B =5.1 cm = 15 mm = 51 mm C =4.4 cm D =2.3 cm = 44 mm = 23 mm E =3.6 cm F =5.9 cm = 36 mm = 59 mm G = 7.6 cm H =0.7 cm = 76 mm = 7 mm**How do you measure the length of a pencil?**Is this correct? One end of the pencil must be at 0. Read the length on the ruler at the other end of the pencil.**Measure it!**At the end of the activity How many centimetres are there in 1 metre? How many centimetres are there in 5 metres? How many millimetres are there in 1 metre? How many millimetres are there in 2 metres? How long is your ruler? Roughly how wide is your little finger? Roughly how long is your foot? Roughly how wide is your armspan? How many millimetres are there in 1 centimetre? How many millimetres are there in 1.5 cm? What length in centimetres is the same as 24 mm?