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a)2x8=16

b)4x8=32

If you understand the transitive properties of multiplication, then the answer to a) tells you that if you double the 2 (to 4) it is the same as doubling the solution (16) ----> b) could be thought of or read as doubling the 16 or reduced to 16+16 = 32

Alternatively you may notice a binary power series developing, that is, w/o solving for b) we see 21 22 23 24 ----> the solution to b) is 25=32

One other implication of the power series:

a) 21x23 = 24 =16 ------>

b)22x23 = 22+3 = 25 = 32

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