45×20= 25×3×4= 240×3=
30×6= 35×2×5= 900÷30=
6.85、8.065、5.86、8.56、8.605
>>>>
8.4-5.6= 1.25×0.08= ÷8=
4÷0.2= 50×4%= 7× ÷7× =