willowtree10290 willowtree10290

26-07-2017
Mathematics

contestada

Find 93 • 87 using mental math.

Respuesta :

ericforteza001 ericforteza001

03-08-2017

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

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