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Mental Maths Workbook - multiplication by 5 trick

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The multiplicand can be an even number or an odd number. An even number is one which ends in 0,2,4,6 or 8. An even number is always divisible by 2.

Multiply an even number by 5

When we multiply an even number by 5:

x

Multiply an odd number by 5

When we multiply an odd number by 5:

x

Note that we can apply this trick to any number, no matter how large. For instance, to multiply 1234 by 5:

x

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