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括号5/7-1/4+3/8括号乘56

(5/7-1/4+3/8)×56 =5/7×56-1/4×56+3/8×56 =40-14+21...

原式=-3/4×24+7/8×24+5/12×24=-18+21+10=13

3/4+括号2/3-5/8括号 =3/4-5/8+2/3 =1/8+2/3 =3/24+16/...

[3/4÷(1/2)+5/8]*4/5 =[3/4*2+5/8]*4/5 =[3/2+5/8]*...

(3/8-4/5+7/10)×40 =3/8×40-4/5×40+7/10×40 =15-32+...

括号1-8分之七括号乘括号二分之1+4分之三括号: (1-7/8)x(1/2+3/4) =1/8...

-7/8,除以,二又1/4乘以括号,-3又1/5括号 =(-7/8)/(9/4)x(-16/5) ...

(3/7+5/8)X56 =(3/7)X56+(5/8)X56 =3X8+5X7 =24+35...

(3/8+1/7)x(6+1/7) =29/56x43/7 =1247/392 , 你好,本...

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