Question

7/4乘以18/5加7/3除以5/18怎样用简便的方法计算

7/4乘以18/5加7/3除以5/18怎样用简便的方法计算

Answer 1

7/4*18/5+7/3/(5/18)
=7/4*18/5+7/3*18/5
=7/2*9/5+7*6/5
=7/5*9/2+7/5*6
=7/5*(9/2+6)
=7/5*21/2
=147/10
=14.7

Answer 2

7/4×18/5+7/3÷5/18
=7/4×18/5+7/3×18/5
=（7/4+7/3）×18/5
=1×18/5
=18/5