4.2×10³×0.6×30=4.2×10³×18=4.2×18×10³=75.6×10³=75600
4.2×10^3×0.6×30怎么算？4.2×10^3×0.6×30=4.2×10^3×18=75.6×10^3=75600
4.2×10^3×0.6×30=4200*18=8400*9=84000-8400=80000-4400=76000-400=75600
