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九分之5+小括号3/4%2分之一小括号等于多少脱式计算

4/5+9/15-2/9 =4/3-2/9 =12/9-2/2 =10/9

5/9加括号3/4-1/2 5/9+(3/4-1/2) =5/9+(3/4-2/4) =5/9+1/4 =20/36+9/36 =29/36

5/9-(5/6-7/12) =20/36-(30/36-21/36) =20/36-9/36 =11/36

2/3乘以中括号3/10除以小括号1/3+2/5小括号中括号=2/3*【3/10/(1/3+2/5)】=2/3*【3/10/(11/15)=2/3*9/22=3/11。

8/9-(5/6-1/3) =8/9+1/3-5/6 =11/9-5/6 =22/18-15/18 =7/18

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

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

原式=4.3+(0.6+6.4) =4.3+7 =5

3/4-(2/5+3/10) =3/4-7/10 =15/20-14/20 =1/20

13/18÷(5/6+2/3×3/8) =13/18÷(5/6+1/4) =13/18÷13/12 =2/3

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