Multiply two numbers where one of them is an even number. This lesson works best when the even number is a power of 2.
Example
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Step 1
Halve the even number and double the other number.
42 x 16
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Double 21
Half of 32
Step 2
Repeat until the answer is reached.
84 x 8
168 x 4
336 x 2 = 672
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