Question

几道数学和英语题

如果-x=-5,那么x=？ 如果-a=a,那么a=？
1-2+3-4+5-6+7-8+...-100+101=？
-1+3-5+7-9+...-97+99=？
要详细解答！！！
It is a red pen in English.对a red pen 提问
My computer is very new.改为一般疑问句
That is a baseball.改为反问句
these是？代词
That is a yellow pencil. 就a yellow pencil提问
一般疑问句是什么

Answer 1

如果-x=-5，那么x=5；如果-a=a，那么a=0
1-2+3-4+…-100+101=51,你可以两项两项的结合算，最后再加上101
-1+3-5+7-…-97+99=50，也是两个两个的算，最后再看有25个2，所以就是50了
回答：what is it in English?
Is your computer very new?
That is a baseball,isn't that?
these是表示复数的指示代词，意思是“这些”
what is that?
一般疑问句是疑问句的一种。它是指用yes（是）或no（否）来回答的 句子。其结构是:系动词be/助动词/情态动词＋主语＋其他成分?

Answer 2

1.5
2.0
3.51
4.50
5.What is this in English?
6.Is your computer very new?
7.Isn't that a baseball?
8.these是代词
9.What is that?
Is that a yellow pencil?