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(1/2+1/3)÷2/5%2/3 脱式计算,简便计算. 我会给好...

无简单方法

1/2+2/3×括号3/4-1/6。脱式计算 解:采用分配律, 原式=1/2+2/3x(3/4-1/6) =1/2+2/3x3/4-2/3x1/6 =1/2+1/2-1/9 =1-1/9 =8/9

5/9

脱式计算,能简便的简便: 1/3÷[(1/3+1/7)×2] = 1/3÷[10/21×2] = 1/3÷20/21 =7/20

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

(1/2-1/3-1/2+1/4)Ⅹ36 =(-1/3+1/4)*36 =-1/3*36+1/4*36 =-12+9 =-3

red

解:原式=5/8-(1/2*5/11+3/5*5/11) =5/8-(5/22+3/11) =5/8-(5/22+6/22) =5/8-11/22 =5/8-1/2 =5/8-4/8 =1/8

原式=8/9÷(4/3-2/3) =8/9÷2/3 =8/9 ×3/2 =4/3

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