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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. 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

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

1/3+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+...

采纳哦

因为9/20=1/4+1/5,10/21=1/3+1/7,11/24=1/3+1/8,12/35=1/5+1/7。 所以: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...

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+3/8+11/24=(8+3+11)/24=22/24=11/12=1-1/12 2/5+5/7+79/35=(14+25+79)/35=118/35=3+13/35 9/20+10/20=19/20=1-1/20 13/35-1/20=1/5(13/7-1/4)=1/5(52-7)/28=1/5 *45/28=9/28 9/28-1/12=1/4(9/7-1/3)=1/4 *(27-7)/21=1/4 *20/21=5/21 综上所...

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

奥数问题 (1+100)*50=5050 乘于50因为1+100=101、2+99=101.3+98=101、4+97=101、5+96=101 以此类推共有50个101 所以等于50*101=5050

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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