Question

简便2.25乘7又5分之1加2.8除以9分之4

Answer 1

2.25乘7又5分之1加2.8除以9分之4
=2.25*7.2+2.8*9/4
=2.25*7.2+2.8*2.25
=2.25*(7.2+2.8)
=2.25*10
22.5