4.8-3.2×0.2=4.8-0.64=4.160.32+0.8×0.6=0.32+0.48=0.89.9×13.6=10×13.6-0.1×13.6=136-1.36=134.648.36-2.48-3.52=8.36-(2.48+3.52)=8.36-6=2.363.2×1.64-1.71=5.248-1.71=3.538
