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Study Guide : Multiplication Calculations

Learner Guide

 

Maths


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Multiplications Calculations


There are many different ways of multiplying numbers together.If you know

your multiplication tables, this will be much easier.

Mental methods such as multiplying by an easier number and then halving

to get the answer or breaking one of the numbers down into tens and units

and multiplying separately can be very helpful.

 

  Example 1.

  If we want to do 67 x 5, we can find the answer quickly by doing 670 x 10 then halving the answer

If we have a question like 12 x 22, we can break 22 down into 20 and 2, then do 12 x 20 and 12 x 2.

 

 

For harder questions, it might be better to use a written method of

multiplication instead.

 

  Example 2.

Let’s say that the sum we’ve been given is 164 x 82

We’ll use the grid method to find the answer first

x100604
8080004800320
22001208

 

We can also use a column method for the multiplication

1 6 4

X      8 2

___________

1 3 1 2 0

3 2 8

___________

1 3 4 4 8

Remember when multiplying decimals that you can still use

multiplication facts; you just have to divide them by ten or a

hundred etc depending on the decimal


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