题目内容
1000+999-998-997+996+995-994-993+…+108+107-106-105+104+103-102-101=______.
1000+999-998-997+996+995-994-993+…+108+107-106-105+104+103-102-101
=1000+(999-998)-(997-996)+(995-994)-(993-992)+…+(107-106)-(105-104)+(103-102)-101,
=1000+1-1+1-1+…+1-1+1-101,
=1000+1-101,
=900.
故答案为:900
=1000+(999-998)-(997-996)+(995-994)-(993-992)+…+(107-106)-(105-104)+(103-102)-101,
=1000+1-1+1-1+…+1-1+1-101,
=1000+1-101,
=900.
故答案为:900
练习册系列答案
相关题目