9.8*4.8+0.48简便计算

分类: 作业答案 • 2021-12-20 05:37:05

问题描述：

9.8*4.8+0.48简便计算

答

9.8*4.8+0.48=98*0.48+0.48=(98+1)*0.48=99*0.48=(100-1)*0.48=100*0.48-0.48*1=48-0.48=47.52

答

=98*0.48+0.48=(98+1)0.48=99*0.48=(100-1)*0.48=48-0.48=47.52