Question

Explain how 9*4 can help you find 9*8

Answer 1

It can help because 9×4 =36, and 9×8=72. if you divide 72 by 2 you get 36 which is the answer to 9 ×4. basically because nine is the same in both problems you are multiplying by 4 (and you know 4 is half of 8) you can assume that multiplying the sum of 4 and 9 that you will get the sum of 8 and 9.

Answer 2

Because 9*4=36 and 4 is half of 8 so you need to multiply 36*2 and you get 72 and 9*8=72