27+0.73=　     2.35﹣2.3=　     0.15×4=　   　
0.2×7.8×0.5=　     6×0.4=　     0.125×8=　   　
7.2÷0.9=　     9.3÷0.03=　     0÷2.1×6.5=　   　
1÷0.2÷0.5=　     130×5=　     280÷0.7=　   　．