Question

why would you use the associative property of muktiplication to solve (10×4)×2? How would you regroup the factors ?

Answer 1

I would use the associative property of multiplication for (10x4)x2 by doing (4x2) x 10. I would do this because I know 4x2 = 8 x10 = 80. It is also easier to do mentally.

I hope this helps! :D