How do you multiply 20 by the sum of 36 and 64?

Answer 1

Well, you could start by finding out what that sum is: 36 + 64 = 100 .

Then, knowing the sum, you can go ahead and multiply 20 by it: 20 x 100 = 2,000 .

A somewhat more formal approach might look like this:

20 (36 + 64) = (20 x 36) + (20 x 64) = (720) + (1,280) = 2,000