1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 11:57:42
![1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;](/uploads/image/z/70551-63-1.jpg?t=1.%EF%BC%88-2+3%2F4%EF%BC%89%2B%EF%BC%88%2B12+5%2F7%EF%BC%89%2B%EF%BC%88-4.125%EF%BC%89%2B%EF%BC%88%2B0.75%EF%BC%89%2B%EF%BC%88%2B1%2F8%EF%BC%89%EF%BC%9B2.%EF%BC%88-8+3%2F7%EF%BC%89%2B%EF%BC%88-7.5%EF%BC%89%2B%EF%BC%88-21+4%2F7%EF%BC%89%2B%EF%BC%88%2B3+1%2F2%EF%BC%893.%EF%BC%88-2+1%2F2%EF%BC%89%2B%28%2B5%2F6%EF%BC%89%2B%EF%BC%88-0.5%EF%BC%89%2B%28%2B1+1%2F6%29%3B4.%28-1%29%2B2%2B%28-3%29%2B4%2B%28-5%29%2B6%2B...%2B%28-99%29%2B100%3B)
1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);
2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)
3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);
4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8)
= -2.75+0.75+12又5/7-4.125+0.125
= -2-4+12又5/7
=6又5/7
2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)
== -8又3/7-21又4/7-7.5+3.5
= -30-3.5
= -33.5
3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);
= -2.5-0.5+5/6+1又1/6
= -3+2
= -1
4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
= (-1+2)+(-3+4)……+(-99+100)
= 1×50
=50
就是把各个分数先化简 再通分 加减起来就好了
可以把小数换成分数的形式统一计算,也可以把分数换成小数的方式统一计算。这些题目考的就是你的小数和分数转换的!能不能写出过程来 让我看看我写对了没.......拜托你把你的步骤写给出来,我来检查看一下。.......................................................................................................
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可以把小数换成分数的形式统一计算,也可以把分数换成小数的方式统一计算。这些题目考的就是你的小数和分数转换的!
收起
4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100
=-1+2+(-3)+4+(-5)+6+...+(-99)+100
=-1+(-1)+(-1)+...+(-1)
=-50
在第2部要把—1都在下面表出来是50个