Answers

2016-06-26T20:04:38+08:00
Multiply the 3 by itself.
=(9-2)+(9×21)
Then,Subtract the 9 by 2. And multiply the 9 to 21
=7+189
Then, add them.
=196
That's it.
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2016-06-27T16:00:47+08:00
(9-2)+(3²×21)=
7 + 63²
7 + 2079
= 2086
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