Can you use doubling for 7 times 3

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asked Mar 16, 2018 163k views

2 Answers

Reallyethical · Answer 1 · 2018-03-21T16:00:37+0000

Well yea doubling is like getting the same number like 7×3 with equals 21
So you have to find the same number 21, but in a different way like this

7
7 7
+7 ×3
------ -----
21 21

Can you use doubling for 7 times 3

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