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L/O: To draw straight lines accurately using CM and MM



Practise your times tables either with times table rockstars or counting on in 3's,4's or 8's.



Today you need to use a ruler to measure lines. You could get an adult to draw some lines for you or if you are able to print you can coy the image I have attached below and print it.



If you look at the image above you will see that some numbers are marked clearly on the ruler. These units of measurement are known as centimetres. Between each number you will see shorter lines. These units of measurement are known as millimetres. 10 Millimetres = 1 cm.


Today you will be measuring using both units.  

Watch the video below for some useful tips.

Measuring to the nearest cm and mm

Use a ruler and find out how you can measure to the nearest cm and convert that number to mm. A centimeter is exactly ten millimeters.


Sometimes we have to measure to the nearest CM. To do this we need to look at the number of MM after the CM. If the number of MM is 4 or less so we round DOWN to the nearest CM. For example if a line measured 3cm and 4mm the nearest CM would be 3CM.

If we had a line that measured 3cm and 5mm we would round up to 4cm.


No try to solve the problem below. You can make your own maze to measure if you are unable to print!