0.58×5= 7.5×0.4= 9÷0.3=
8.1÷0.9-0.8= 53×0.5×6= 6.4÷0.01=
10×(10.1-9.8)= 6.2×101-6.2=
0.63÷0.9=
60×0.5=
1÷0.25=
4.5×8=
2.2×0.3=
7.2÷10=
0.51×100=
0.42÷0.07=
299800 ≈万
682850000 ≈亿
70150900 ≈万
680000000 ≈亿