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Maths - 3

Here we have the "Grid method" of multiplying.

If you are multiplying 47 by 68 you simply put 40 then 07 in the across squares and 60 and 08 in the down squares. Then add them up.

X 40 07 Add Total
60 2400 420 2820 3196
08 320 56 376

You can also multiply numbers & decimals so don't forget to put your decimal point in.

Multiply 27.3 by 6

X 20 07 0.3 Total
6 120 42 1.8 163.8

You can split numbers in different ways - 34 X59

X 30 04 Add Total
50 1500 200 1700 2006
09 270 36 306

Or you can do it this way - Multiply by 60 then take one multiplication away.

X 30 04 Add Total
60 1800 240 2040 2006
MINUS 01 30 04 34

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29/07/2010 | erichughes39@o2.co.uk

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