Question

(六分之一+十五分之七)÷五分之二+十二分之五用脱式计算(能简便就简便计算)

Answer 1

(1/6+7/15)÷2/5+5/12
=(1/6+7/15)×5/2+5/12
=1/6×5/2+7/15×5/2+5/12
=5/12+5/12+7/6
=5/6+7/6
=2