13.26-2.8+2.8-3.39怎么简便计算

分类: 作业答案 • 2021-12-19 11:37:39

问题描述：

答

5.24-1.86+0.24 =5+0.24-(1+0.86)+0.24 =5+0.24-1-0.86+0.24 =0.24+0.24-0.86+5-1 =-0.38+5-1 =4-0.38 =3.62 这样

答

13.26-2.8+2.8-3.39
=13.26-2.8+2.8-3.26-0.13
=(13.26-3.26-0.13)-(2.8-2.8)
=9.87-0
=9.87

答

13.26-2.8+2.8-3.39=13.26+（2.8-2.8）-3.39=13.26-3.39=9.87

答

13.26-2.8+2.8-3.39=13.26+（2.8-2.8）-3.39=13.26-3.26-0.13=(13.26-3.26)-0.13=10-0.13=9.87