199-198+197-196+195-194+…+5-4+3-2+1

199-198+197-196+195-194+…+5-4+3-2+1.
2024-12-29 16:07:49
推荐回答(1个)
回答1:

199-198+197-196+195-194+…+5-4+3-2+1,
=(199-198)+(197-196)+…+(5-4)+(3-2)+1,
=1+1+…+1,
=100.