{1+[1/12-(-1/15)]*(-2)}/(1/12-1/15-0.05)

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/24 02:37:36

{1+[1/12-(-1/15)]*(-2)}/(1/12-1/15-0.05)
={1-(1/12+1/15)x2}/(1/12-1/15-1/20)
=(1-1/6-2/15)/(5/60-4/60-3/60)
=(1-5/30-4/30)/(-1/30)
=(21/30)/(-1/30)
=-21

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)