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(1/31/4)÷1/2+5/6 要计算过程

(4/12-3/12)/1/2+5/6=1/12/1/2+5/6=1/6+5/6=1

等于2又5分之4

上下两边同时乘以60再算

(1/3十1/4一1/6)X3.1=1/3X3.6十1/4X3.6一1/6X3.6=1.2十0.9一...

解: 把分数写规范 (-3)÷(-2/5)÷(-1/4)-12x(5/6-1/3-1/4) =(-3...

=(2-1.5)/1.5=0.5/1.5=1/3

列式计算:1/2:1/3=1/4:x 1/2×x=1/3×1/4 1/2×x=1/12 x=1/12...

19÷[(3/4+1/5)÷1/2]=19/19/10=10 24×(3/8+5/6)=24*29...

-1/6+1/2-4/5+2/3 =1/3-4/5+2/3 =1/5

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