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Multiplying by 2's

When multiplying by 2's just think of the number number you are multiplying 2 by, added to it's self.

Example: 5 + 5 = 10 5 x 2 = 10

Addition	Multiplication	Addition	Multiplication
4 + 4 =	2 x 4 =
6 + 6 =	2 x 6 =
2 + 2 =	2 x 2 =
7 + 7 =	2 x 7 =
9 + 9 =	2 x 9 =
8 + 8 =	2 x 8 =
10 + 10 =	2 x 10 =