5.4÷1.2=÷12
3.8÷0.19=÷19
24÷0.15=÷
2.042.40 3.5×0.43.5÷0.4
0.970.97×1.5 53400000534万
①0.74×99
②1.39×6.1+3.9×1.39
③2.4×0.7÷2.4×0.7
④42.72÷0.48+0.52
⑤4.9÷0.25÷0.4
0.1×25×4= 22.9÷2.29= 8×12.5%= 4.5×=
9+1÷10= ++= ÷= (+)×20=