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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

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

2/9

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

4/5-(3/8+1/4) =4/5-5/8 =32/40-25/40 =7/40

10分之9-(4分之1-10分之1) =10分之9-4分之1+10分之1 =10分之9+10分之1-4分之1 =1-4分之1 =4分之3

六分之5-调括号六分之5减八分之五反括号等于多少脱式计算 (5/6)-(5/6-5/8) =(5/6)-(5/6)+(5/8) =5/8.

250×小括号1-1/2减五分之1=多少用脱式计算 250×小括号1-1/2减五分之1 =250×(1-1/2-1/5) =250×3/10 =75

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

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

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