Junior1965
Junior1965
12-01-2017
Mathematics
contestada
Can you use doubling for 7 times 3
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Student2332
Student2332
12-01-2017
What do you mean doubling? You can add 7+7+7 which equals 21.
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PrettyAwesomeSmart
PrettyAwesomeSmart
12-01-2017
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
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