Find 93 • 87 using mental math.

Okay so start with multiplying 93 * 7

So 3 x 7 = 21

9 X 7 + 63, carry the 2 = 651

Then 8 x 93

Remember that first is a zero.

8 X 3 = 24

8 X 9 = 72, carry the 2 = 74

So that is 7440

Now

0651

+7440

8091

And that's the answer