直接写得数：
0.5×1.2=   0.963÷9=    1.85×5=   1.7÷0.27=   0.8×1.25=
7.7×0.5×0.2=    （0.2+0.2+0.2）÷0.3=     4.2÷0.01=
21.8﹣7.2﹣2.8=   0.5÷0.5+（0.9﹣0.9）=