问题
解答题
999+998+997十996+1000+1004+1003+1002+1001.
答案
999+998+997+996+1000+1004+1003+1002+1001
=(999+1001)+(998+1002)+(997+1003)+(996+1004)+1000,
=2000×4+1000,
=9000.
999+998+997十996+1000+1004+1003+1002+1001.
999+998+997+996+1000+1004+1003+1002+1001
=(999+1001)+(998+1002)+(997+1003)+(996+1004)+1000,
=2000×4+1000,
=9000.