直接写得数．
4.2×0.5=6.7+5.8+3.3=0.16÷0.08=5.1-0.7-2.3=0.28×9+0.28=2.5×0.5=（4.8+5.2）×3.6=0.18÷9=2.52×0.7÷O.07=1.25×0.8×0.5=
网友回答
解：4.2×0.5=2.1；??6.7+5.8+3.3=15.8；????0.16÷0.08=2；????5.1-0.7-2.3=2.1；??? 0.28×9+0.28=2.8；
2.5×0.5=1.25；???（4.8+5.2）×3.6=36；? 0.18÷9=0.02；???2.52×0.7÷O.07=25.2； 1.25×0.8×0.5=0.5；
故