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括号负24反括号乘以括号负6分之一加8分之三减12分...

72分之一

1/6+(5/6-3/8) =1/6+5/6-3/8 =1-3/8 =5/8

(-1/2-1/3+1/4)×12=-7-(-4²)-4×3=4

4×(-15)×(-7/8+1又3/4-7/12) =-60×(-7/8+1又3/4-7/12) =60×7/8-60×1又3/4+60×7/12 =52.5-105+35 =-17.5

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

=(1/6+1/8)×24 =1/6×24+1/8×24 =4+3 =7

括号负五乘以括号正七又三分之一加括号正七乘以括号负七又三分之一减括号正十二乘以七又三分之一 解: (-5)×(+7 又1/3)+(+7)×(-7又1/3)-(+12)×7又1/3 =(-5-7-12)×7又1/3 =-24×7又1/3 =-176

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