简便运算13/28+17/24-(13/28+9/24)
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简便运算13/28+17/24-(13/28+9/24)
简便运算13/28+17/24-(13/28+9/24)
简便运算13/28+17/24-(13/28+9/24)
13/28+17/24-(13/28+9/24)
=13/28-13/28+(17/24-9/24)
= 1/3
13/28+17/24-(13/28+9/24)=13/28+17/24-13/28-9/24=(13/28-13/28)+(17/24-9/24)=0+1/3=1/3