问题
填空题
1+2-3+4-5+6-…-199+200-201+202=______.
答案
(202-201)+(200-199)+…(6-5)+(4-3)+2+1
=1×100+2+1
=103.
故答案为:103.
1+2-3+4-5+6-…-199+200-201+202=______.
(202-201)+(200-199)+…(6-5)+(4-3)+2+1
=1×100+2+1
=103.
故答案为:103.