奥数题一道: 1+2+3+4+5+6+‘’‘’‘’+96+97+98+99+100

2024-12-16 15:47:44
推荐回答(5个)
回答1:

1+2+3+4+5+6+7+8+9+10+11+"""""+97+98+99+100
=(1+100)*100/2
=101*100/2
=10100/2
=5050

回答2:

100+99+98+97+······+3+2+1
=100X50+100
=101X50
5050

回答3:

(1+100)*100/2=5050

回答4:

(1+100)*100/2=5050

回答5:

5050