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Mental Maths Workbook - multiplication by 10 trick

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Multiplication by 10 is simple. Consider the following example:

multiply_by_10.png

As you can see, the final result is nothing but the multiplicand with a 0 added at the end.

Therefore, whenever you multiply any number by 10, simply copy the number and add a 0 to the end to get the final result.

This also applies to any multiple of 10, say 40. Consider the following example:

multiply_by_10.png

As you can see, the final result is nothing but the multiplicand multiplied with 4 and a 0 added at the end.

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