1、17.6÷0.25-7.6*4
=17.6*4-7.6*4
=（17.6-7.6）*4
=10*4
=40
2、38.25*3.8+0.62*382.5
=38.25*3.8+6.2*38.25
=38.25*(3.8+6.2)
=38.25*10
=382.5