①3.8+4.29+4.2
②5.5×17.3+6.7×5.5
③2.33×0.5×4
④2.73×99
5.5÷0.5=
6.9÷0.01=
2.4×0.4=
1.24÷0.2=
0.2×0.25=
10﹣1.78=
0.13+0.2=
2.5×4÷2.5×4=