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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

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

1/4÷(3-5/13-8/13) =1/4÷【3-(5/13+8/13)】 =1/4÷【3-1】 =1/4÷2 =1/8

=5/7+(3/4+2/7) =5/7+2/7+3/4 =1+3/4 =7/4

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

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

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。

(4/5+1/10)+3/8 =9/10+3/8 =51/40 =1又11/40

2/7÷(3/5+1/3) =2/7÷(9/15+5/15) =2/7÷(14/15) =2/7×15/14 =15/49

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

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