Posted by Peter on 21st April 2009
Multiplying by whole tens pg 1
This method for multiplying by whole tens follows the ‘short multiplication’ method for multiplying 2digits by 1digit, but is also the first step in ‘long multiplication’. Children should be very familiar with short multiplication of 2digits by 1digit before moving on to this work.
It also assumes a good knowledge of place value and that, by moving a digit one place to the left the number will be multiplied by 10. Therefore by multiplying by 7 and placing each digit of the answer one place to the left, the result is to multiply by 70 (Don’t forget the zero in the units).
This maths worksheet shows the method and sets out 12 questions.
Download “Multiply By Whole Tens”File Size: 69.52 KB
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