(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)
(1)1+1/2+1/3+1/4+1/5+1/6+1/7+1/14+1/28
(2分之1-3分之1)+(4分之1-5分之1)+(7分之1-10分之1)+(14分之1-15分之1)+(28分之1+30
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30))
简算:(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)=?
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
(1+2/1)(1+4/1)(1+6/1).(1+10/)(1-3/1)(1—5/1).(1-9/1)
(14/5+4/1-7/5)*28 4-4*8/3-8/1 30*(15/4+5/3+10/7) (12/5+4/3-6
6/1十3/1十2/1 15/8+(30/7一5/1) 7/6一(7/1+2/1) 10/9-(4
(1/2-1/3) (1/4-1/5) (1/7-1/10) (1/14-1/15) (1/28 1/30)怎么算
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28+1/30)怎么算
1.动脑筋计算:(1+1/2)*(1+1/4)*(1+1/6)*…* (1+1/10)*(1-1/3)*(1-1/5)*