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3times10-3

 Feb 29, 2016
 #1
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                           27

 Feb 29, 2016
 #2
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21, 10-3=7, 7x3= 21

 Feb 29, 2016
 #3
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Use PEMDAS. 3*10-3=27

rarinstraw1195  Feb 29, 2016

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