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2分之1-括号5/6-8分之三反括号等于多少用脱式计算

1/2-(5/6-3/8) =1/2-(20/24-9/24) =1/2-11/24 =12/24-11/24 =1/24

5/6-(1/7+1/8) =5/6-(8/56+7/56) =5/6-15/56 =140/168-45/168 =95/168 =168分之95

5/6-(3/8+5/12) =20/24-(9/24+10/24) =20/24-19/24 =1/24

括号6分之1减8分之1括号除以6分之5的脱式计算 (1/6-1/8)÷5/6 =(4/24-3/24)x6/5 =1/24x6/5 =1/20

解:5/9+(3/4-1/2) =5/9+1/4 =20/36+9/36 =29/36

2/5×[1/5+8/21÷(4/7)] =2/5x(1/5+2/3) =2/5x(13/15) =26/75

八分之5-括号1/3-8分之三脱式计算能简就简 5/8-(1/3-3/8) =5/8+3/8-1/3 =1-1/3 =2/3

3×(2/15+1/12)-2/5 =3×13/60-2/5 =13/20-2/5 =1/4

请问后3/4 6分之五小括号乘以12=多少用脱式计算 (3/4+5/6)×12 =3/4×12+5/6×12 =9+10 =19

解:采用分配律, (1/4+5/6-2/3)x12 =1/4x12+5/6x12-2/3x12 =3+10-8 =13-8 =5

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