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4/5+2/3÷(5/6-1/2)等于多少?要过程

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

计算 5/6-1/2+3/4 =5/6+3/4-1/2 =5/6+1/4 =13/12

2/3÷(1-15/24 2/3÷3/8 2/3×8/3 16/9

[4-(5/8-1/2)]÷2/3 =(4-1/8)÷2/3 =31/8÷2/3 =93/16 5/6×3/4+5/6÷4 =5/6x3/4+5/6x1/4 =5/6x(3/4+1/4) =5/6x1 =5/6

=5/6+4/6-(1/4+2/4) =9/6-3/4 =6/4-3/4 =3/4

(1/3-1/2+1/6)÷(2/3+5/6) =(2/6-3/6+1/6)÷(4/6+5/6) =0÷3/2 =0

按照四则运算先乘除 前面括号内算下来是5/4 后面括号里面(-1/2)2 理解为(-1/2)×2 即等于(-1) 所以(5/4)÷(-1)=(-5/4) -5/4

7/8+2/3÷(4/5)+1/6 =7/8+5/6+1/6 =7/8+1 =1又7/8

如图

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