简算:七分之五减六分之五乘五分之二,10x8\5x3\4,13\16+13\16x5+5\16
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简算:七分之五减六分之五乘五分之二,10x8\5x3\4,13\16+13\16x5+5\16
简算:七分之五减六分之五乘五分之二,10x8\5x3\4,13\16+13\16x5+5\16
简算:七分之五减六分之五乘五分之二,10x8\5x3\4,13\16+13\16x5+5\16
七分之五减六分之五乘五分之二=5/7-5/6×2/5=5/7﹣1/3=8/21
10x8\5x3\4=12
13\16+13\16x5+5\16=(13+65+5﹚/13=83/13