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Olive Leonard
Mathematics
21 September, 16:08
Find 93 • 87 using mental math.
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Scott Noble
21 September, 16:33
0
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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