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1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+19/35怎么做

1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+12/35 =1/3+3/4+2/5+5/7+7/8+(1/4+1/5)+(1/3+1/7)+(1/3+1/8)+(1/5+1/7) =(1/3+1/3+1/3)+(3/4+1/4)+(2/5+1/5+1/5)+(7/8+1/8)+(5/7+1/7+1/7) =4+4/5 =4.8

1. x-4/3=1/2 x=11/6 2. 3/4*3/5+3/4×2/5 =9/20+6/20 =3/4 3. 52×1/9+47÷9+1/9 =(52+47+1)/9 =100/9

采纳哦

1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+19/35 =1/3+3/4+2/5+5/7+7/8+(4/20+5/20)+(3/21+7/21)+ (3/24+8/24)+(5/35+14/35) =1/3+3/4+2/5+5/7+7/8+1/5+1/4+1/7+1/3+1/8+1/3+2/5+1/7 =1/3X3+(3/4+1/4)+(2/5+1/5+2/5)+(5/7+1/7+1/7)+(7/8+1/8) =1+1+...

解: 1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+12/35 =1/3+3/4+2/5+5/7+7/8+(1/4+1/5)+(1/3+1/7)+(1/3+1/8)+(1/5+1/7) =(1/3+1/3+1/3)+(1/4+3/4)+(2/5+1/5+1/5)+(5/7+1/7+1/7)+(7/8+1/8) =4+4/5 =4又4/5

1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+19/35 =1/3+3/4+2/5+5/7+7/8+(4/20+5/20)+(3/21+7/21)+ (3/24+8/24)+(5/35+14/35) =1/3+3/4+2/5+5/7+7/8+1/5+1/4+1/7+1/3+1/8+1/3+2/5+1/7 =1/3*3+(3/4+1/4)+(2/5+1/5+2/5)+(5/7+1/7+1/7)+(7/8+1/8) =1+1+...

9/20可以分解成1/4+1/5 10/21可以分解成1/3+1/7 11/24可以分解成1/3+1/8 19/35可以分解成2/5+1/7 所以 分母相同的数字相加 结果都是1 一共五组 结果是5 得解

1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+12/35 =1/3+3/4+2/5+5/7+7/8+(1/4+1/5)+(1/3+1/7)+(1/3+1/8)+(1/5+1/7) =1/3+1/3+1/3+3/4+1/4+2/5+1/5+1/5+5/7+1/7+1/7+7/8+1/8 =1+1+4/5+1+1 =4又5分之4

1/3+3/4+2/5+7/8+9/20+10/21+11/24+12/35 =1/3+3/4+2/5+7/8+1/4+1/5+1/3+1/7+1/3+1/8+1/5+1/7 =(1/3+1/3+1/3)+(3/4+1/4)+(7/8+1/8)+(2/5+1/5+1/5)+(1/7+1/7) =1+1+1+4/5+2/7 =4又3/35

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