49.5×0.2-2.07÷23=9.9-0.09=9.8148.6-1.6÷4=48.6-0.4=48.2
49.5x0.2-2.07÷23=9-0.09=8.9148.6-1.6÷4=48.6-0.4=48.2
9.9-0.09=9.81
9.81;48.2
49.5×0.2-2.07÷23=9.9-0.09=9.81