9.9 x 4.8 + 0.48= (10 - 0.1)x 4.8 + 0.48= 10 x 4.8 - 0.1 x 4.8 + 0.48= 48 - 0.= 48
9.9*4.8+0.48=0.48*(99+1)=0.48*100=48
=9.9X4.8十0.1X4.8=(9.9+o.1)X4.8=1OX4.8=48