简便计算,能简便的简便 5/7÷(5-3×2/3) 84×0.25+1/4×16 48×(1/3-1/2+1/4)

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简便计算,能简便的简便5/7÷(5-3×2/3)84×0.25+1/4×1648×(1/3-1/2+1/4)简便计算,能简便的简便5/7÷(5-3×2/3)84×0.25+1/4×1648×(1/3-

简便计算,能简便的简便 5/7÷(5-3×2/3) 84×0.25+1/4×16 48×(1/3-1/2+1/4)
简便计算,能简便的简便 5/7÷(5-3×2/3) 84×0.25+1/4×16 48×(1/3-1/2+1/4)

简便计算,能简便的简便 5/7÷(5-3×2/3) 84×0.25+1/4×16 48×(1/3-1/2+1/4)
第一题,5/7÷(5-2)=5/7÷3=5/21