7.24*5分之3+0.6*2.41-0.65*5分之3

7.24*5分之3+0.6*2.41-0.65*60% =0.6(7.24+2.41-0.65) =0.6*9 =5.4

7.24*3/5+0.6*2.41-0.65*3/5
=7.24*3/5+3/582.41-0.65*3/5
=3/5*(7.24+2.41-0.65)
=3/5*9
=27/5
=5.4

7.24*(3/5)+0.6*2.41-0.65*(3/5)
=(7.24-0.65)*(3/5)+0.6*2.41
=(7.24-0.65)*0.6+0.6*2.41
=(7.24-0.65+2.41)*0.6
=9*0.6
=5.4
3/5=0.6 每一项均可提起0.6
7.24-0.65+2.41 可先相加再相减。

7.24*5分之3+0.6*2.41-0.65*5分之3
=7.24*5分之3+5分之3*2.41-0.65*5分之3
=（7.24+2.41-0.65）*5分之3
=（9.65-0.65）*5分之3
=9*（5分之3）
=5分之27
=5又5分之2

7.24*5分之3+0.6*2.41-0.65*5分之3
=7.24×0.6+0.6×2.41-0.65×0.6
=0.6×（7.24+2.41-0.65）
=0.6×9
=5.4