{1+[1/12-(-1/15)]*(-2)}/(1/12-1/15-0.05)
1/12+1/15+1/10
2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1
|1/11-1/12|+|1/12-1/13|+|1/13-1/14+|1/14-1/15|
|1\12-1\11|+|3\13-1\12|+1\14-1\13|+|1\15-1\14|+||1\16-1\15|
1÷(1/10+1/15+1/12)
15/16-(7/12+1/6)*1/2
16/15-(12/7+6/1)*2/1=?
1-15分之2-15分之12等于
3/2+6/1+9/1+12/1+15/1+18/1 怎么简算
简算 2/3+1/6+1/9+1/12+1/15+1/18
2/3+1/6+1/9+1/12+1/15+1/18
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)(用简算)