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(1):3加3/4除以3/4加三的商除以七乘1/6除以七乘1/6...

2/3-3/4×4/6+1/3÷3/7 =2/3-1/2+7/9 =1/6+7/9 =17/18

(-2)^4+|1/6-1/3|×27/14-3/40 =16+1/6×27/14-3/40 =16+9/28-3/40 =16+90/280-21/280 =16又69/280。

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这是四条算式??

1/6除以中括号9/17乘以括号3/4加2/3括号中括号 解: 1/6÷[9/17×(3/4+2/3)] =1/6÷(9/17×17/12) =1/6÷3/4 =2/9

1/7(3/4+3/6+6/12)=1/7×7/4=1/4

1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9 =1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9 =1-1/9 =8/9

(三分之二减二分之一)除以五分之三乘以六分之五 =(2/3-1/2)÷3/5×5/6 =(4/6-3/6)×5/3×5/6 =1/6*5/3*5/6 =25/108 七分之一乘以十三分之六加十三分之八乘以七分之一 =1/7*6/13+8/13*1/7 =1/7*(4/13+8/13) =1/7*14/13 =2/13 二分之一除以五分之四...

3/4*4+1/7+3/4*3*6/7=3+1/7+27/14=71/14

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