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OpenStudy (anonymous):
how do you do mental math in division for example 81 divide by 9 or 33 divide by3
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OpenStudy (anonymous):
by 3
OpenStudy (anonymous):
um its just comes with practice
OpenStudy (texaschic101):
read this.. http://www.quickanddirtytips.com/education/math/5-tips-for-faster-mental-division-part-1
OpenStudy (anonymous):
how would you do 81 divide by 9 and 33 divide by 3
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