(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