1/2 1/10 1/30 1/68()
1、 1,2,10,30,68() 2、4,5,8,10,() 3、-1,0,1,2,9,() 4、2,3,13,175
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)
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90+1/10
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30))
1/2÷10+1/2x÷30-40/60=1/2x÷(10+30)
(x-1)(30-1/2(x-10))-(x-10)275
(1/3-1/5-1/10)×30简便计算
(1/2+1/4+1/6+1/10+1/12+1/60)/(1+1/3+1/5+1/10+1/15+1/30)
(1+2/1)(1+4/1)(1+6/1).(1+10/)(1-3/1)(1—5/1).(1-9/1)
1(+8)+(-10)+(-2)+(+1)