measuring in cm
Post on 10-Feb-2017
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Today we will learn …• How many centimetres (cm) there are in a metre (m)
• How to measure using centimetres
• How read from a ruler without all the numbers
How big is a centimetre?
Show me with your fingers:
• 1cm
• 2cm
• 5cm
1 metre = 100 centimetres
How many centimetres are there in:
• 2m?
• 3m?
• One and a half metres?
• Two and a half metres?
• 2 metres and 20 centimetres?
Can you show me on your ruler
• 10cm?
• 20cm?
• 30cm?
• Half way between 0 and 10cm?
• Half way between 10cm and 20cm?
• 5cm? 15cm? 25cm?
Sometimes rulers don’t have all the numbers
on…10 20 30 40 50
… so you have to use your numbers knowledge
to figure it out
5 15 25 35 45 550
Oh no, NO NUMBERS!
2515
442
171035
4½
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