Question

How can you use 4x7 to find 8x7?

Answer 1

You can use it because if you multiply 4x7, the answer is 28 and if you multiply 8x7 it is 56 and 28 is half of 56. Hope that helped!

Answer 2

4 x 7 is 28, and 8 x 7 is 56. You can use 4 x 7 to find 8 x 7 by multiplying that first and doubling that quotient.

Half of 56 is 28, therefore doubling that allows us to find the quotient of 8 x 7.