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Mathematics 9 Online
OpenStudy (anonymous):

use mental math to calculate 49%of 162

OpenStudy (campbell_st):

well 50% = 162/2 10% = 16.2 1% = 1.62 49% = 50% - 1%

OpenStudy (anonymous):

It is just ironic it says mental math :p

OpenStudy (anonymous):

162-100% 49-x? do 49*100/162

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