帮简算以下题目

来源:百度知道 编辑:UC知道 时间:2024/05/02 16:28:13
1、26-0.75+0.25
2、7.26-(5.26-1.5)
3、6.25+3.85-2.125-3.875

解:1.
26-0.75+0.25
=26-(0.75-0.25)
=26-0.5
=25.5

2. 7.26-(5.26-1.5)
=7.26-5.26+1.5
=2+1.5
=3.5

3. 6.25+3.85-2.125-3.875
=(6.25+3.85)-(2.125+3.875)
=10.1-6
=4.1

25.5
3.5
5.1

25.5
3.5
4.1

1、26-0.75+0.25 =26-(0.75-0.25 )=26-0.5=25.5

2、7.26-(5.26-1.5)=7.26-5.26+1.5=2+1.5=3.5

3、6.25+3.85-2.125-3.875=6.25+3.85-(2.125+3.875)=6.25+3.85-6=6.25-6+3.85=0.25+3.85=4.1