9-0.225÷1.5×48 怎么简便计算?

分类: 作业答案 • 2022-06-07 13:41:50

问题描述：

答

0.225=0.2+0.025=1/5+1/40=9/40
0.225/1.5*48=(9/40)/1.5*48=(3/20)*48=7.2

答

9-0.225÷1.5×48
=9-255/1000 *2/3 *48
=9-36/5
=9/5

答

9-0.225÷1.5×48
=9-(0.225×2)×6×8÷(1.5×2)
=9-0.45×6÷3×8
=9-0.45×2×8
=9-0.9×8
=9-7.2
=1.8