Posted by Peter on 4th February 2010

Maths worksheet: Add decimals mentally (2)

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This is a follow up page to an earlier worksheet on adding decimals mentally. The approach is probably the same as adding 2-digit numbers, in that most people seem to do these ‘in their head’ by adding the units first and then adding on the decimals.

So, with 4.6 + 3.5 my thinking would probably go along the lines of:

‘4 + 3 is 7, making 7.6 plus point 5 which is 8.1’.

It is not the only approach, but is usually a very effective one.

Add two decimals mentally (2)

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