计算:(200+198+196+…+2)-(1+3+5+…+199)=_.
问题描述:
计算:(200+198+196+…+2)-(1+3+5+…+199)=______.
答
(200+198+196+…+2)-(1+3+5+…+199),
=[(2+200)×100÷2]-[=(1+199)×100÷2]
=[202×50]-[200×50]
=(202-200)×50,
=100.
故答案为:100.