数学计算提（简便运算）简便计算（1）3分之11除以2分之15乘于11分之6（2）（2除以5分之3加上5分之3除以2）除以30分之109

(1)11/3除15/2乘6/11
=11/3乘2/15乘6/11
=[（11乘2）/（3乘15）]乘6/11
=（22/45）乘6/11
=（22乘6）/（11乘45）
=132/495
=4/15
（2）[（2除3/5）+（3/5除2）]除109/30
=[（2乘5/3）+（3/5乘1/2）]乘30/109
=(10/3+3/10)乘30/109
=（10/3乘30/109）+（3/10乘30/109）
=300/327+9/1090
=10/109+9/109
=109/109
=1

(1)(11/3)÷(15/2)×(6/11)
=(11/3)×(2/15)×(6/11)
=(11/3)×[(2×6)/(15×11)]……约分：分子分母同时除以3
=(11/3)×4/(5×11)
=(11×4)/(3×5×11)……约分：分子分母同时除以11
=4/15
（2）[(2÷3/5)+(3/5÷2)]÷109/30
=[(2×5/3)+(3/5×1/2)]×30/109
=(10/3+3/10)×30/109
=(10/3×30/109)+(3/10×30/109)
=100/109+9/109
=109/109
=1