超简单的数学题 加分

来源：百度知道 编辑：UC知道 时间：2024/05/10 06:04:20
1. 0.4-〈-1/4〉+1/6 2. 3/1+〈-1/5〉+1+2/3
3. 27-18+〈-7〉-32 4. 0.5+〈-1/4〉-〈-2.75〉+1/2
5. 〈-8〉-〈-75〉+〈-9〉-〈-12〉
6 -2/3+〈-1/6〉-〈-1/4〉-1/2
7 3/5-3/2+〈-4/11〉+13/4
一个小时内 最好是初1的答！要写过程！！！谢谢了

自己做的！
累死了！

1.0.4-〈-1/4〉+1/6
=2/5+1/4+1/6
=24/60+15/60+10/60
=49/60

2. 3/1+〈-1/5〉+1+2/3
=3-1/5+1+2/3
=45/15-3/15+15/15+10/15
=67/15

3. 27-18+〈-7〉-32
=27-18-7-32
=-30

4. 0.5+〈-1/4〉-〈-2.75〉+1/2
=1/2-1/4+11/4+1/2
=14/4
=7/2

5. 〈-8〉-〈-75〉+〈-9〉-〈-12〉
=-8+75-9+12
=70

6 -2/3+〈-1/6〉-〈-1/4〉-1/2
=-2/3-1/6+1/4-1/2
=-8/12-2/12+3/12-6/12
=-13/12

7 3/5-3/2+〈-4/11〉+13/4
=3/5-3/2-4/11+13/4
=132/220-330/220-80/220+715/220
=437/220

谢谢~

1. 0.4-〈-1/4〉+1/6 2. 3/1+〈-1/5〉+1+2/3
=0.4+1/4+1/6
=48/120+30/120+20/120
=98/120
=49/60

2. 3/1+〈-1/5〉+1+2/3
=1/3-1/5+1+2/3
=1+1-1/5
=2-1/5
=19/5

3. 27-18+〈-7〉-32
=27-18-7-32
=-30

4. 0.5+〈-1/4〉-〈-2.75〉+1/2
=0.5-0.25+2.75+0.5
=3.5

5. 〈-8〉-〈-75〉+〈-9〉-