0.5÷0.90.5 0.55×0.90.55
7.3×0.373÷3 24×0.624×1.1
3.5×0.4= 500×0.2= 0÷19.8= 7.2×0.01=
0.47÷10= a×8×a= 3.6÷9= 4.5÷0.9=