1/8+1/24+1/48+1/120,简便算法,急

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1/8+1/24+1/48+1/120,简便算法,急1/8+1/24+1/48+1/120,简便算法,急1/8+1/24+1/48+1/120,简便算法,急1/8+1/24+1/48+1/120=（3

1/8+1/24+1/48+1/120,简便算法,急
1/8+1/24+1/48+1/120,简便算法,急

1/8+1/24+1/48+1/120,简便算法,急
1/8+1/24+1/48+1/120
=（30+10+5+2）/240
=47/240

1/8+1/24+1/48+1/120 =1/2*(1/2-1/4)+1/2*(1/4-1/6)+1/2*(1/6-1/8)+1/2*(1/8-1/10) =1/2*(1/2-1/4+1/4-1/6+1/6-1/8+1/8-1/10) =1/2*(1/2-1/10) =1/2*(5/10-1/10) =1/2*2/5 =1/5

1/8+1/24+1/48+1/80+1/120 =(1/2-1/4)/2+(1/4-1/6)/2+(1/6-1/8)/2+(1/8-1/10)/2+(1/10-1/12)/2 =[(1/2-1/4)+(1/4-1/6)+(1/6-1/8)+(1/8-1/10)+(1/10-1/12)]/2 =（1/2-1/12）/2、 =（5/12）/2、 =5/24

简便计算：1/8+1/24+1/48+1/120 (1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64= (1/8+1/24+1/48+1/80+1/120+1/168+1/224)乘64 (1/8+1/24+1/48+1/80+1/120+1/168)简便计算（1/8+1/24+1/48+1/80+1/120+1/168）乘以56 （8/1+24/1+48/1+80/1+120//1+168/1）*42 1/8+1/24+1/48+1/80+1/120+1/168 （1/8+1/24+1/48+1/80+1/120+1/168）*56 42x(8/1+24/1+48/1+80/1+120/1+168/1)=?求求 42X（1/8+1/24+1/48+1/80+1/120+1/168）求解 42*（1/8+1/24+1/48+1/86+1/120+1/168）简便方法 8分之1+24分之1+48分之1+80分之1+120分之1=? 8/1+24/1+48/1+80/1+120/1要过程计算：（1/8+1/24+1/48+1/80+1/120+1/168+1/224+1/288)*128 (1/8+1/24+1/48+1/80+1/120+1/168+1/224+1/288)*128 简算:(8/1+24/1+48/1+80/1+120/1+168/1+224/1+288/1)×128 （8/1+24/1+48/1+80/1+120/1+168/1+224/1+288/1）*128 （1/8+1/24+1/48+1/80+1/120+1/168+1/224+1/228）*128