4.8×100.1=4.8×(100+0.1)=480 +0.48=480.48希望能帮到你o(≧ v ≦)o~~
4.8×100.1=4.8×(100+0.1)=480 +0.48=480.48
4.8×100.1=4.8×﹙100+0.1﹚=4.8×100+4.8×0.1=480+0.48=480.48
4.8x(100+0.1)=4.8x100+4.8x0.1=480+0.48=480.48