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since 4 is 2 times 2 just double 7 twice: 7 doubled = 14 and then 14 double = 28

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12y ago

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How you could use doubling to find the product 13 X 4?

Doubling a number is equivalent to multiplying by 2. Doubling twice (doubling, and then doubling the result again) is equivalent to multiplying by 4. (Also, doubling three times is the same as multiplying by 8, doubling 4 times is the same as multiplying by 16, etc.)


How can you use doubling to find the product of 88?

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