23.19-2.4+2.91-14.6
=(23.19+2.81+0.1)-(2.4+14.6)
=26+0.1-17
=9.1
7.32*4.8+73.2*0.52
=73.2*0.48+73.2*0.52
=73.2*(0.48+0.52)
=73.2