Question

2道计算题~1.一又七分之三X五分之四+二又七分之四x五分之四+五分之四 2.（二分之一+三分之一）除以十二分之五-十八

Answer 1

1题：

1又3/7×4/5+2又4/7×4/5+4/5

=(1又3/7+2又4/7+1)×4/5

=5×4/5

=4

2题：

(1/2+1/3)÷5/12-17/18

=(3/6+2/6)×12/5-17/18

=5/6×12/5-17/18

=2-17/18

=1又1/18