1+3+……+199
=（1+199）*100/2
=10000
100的平方
猜你喜欢
- 1补充成语,熟语:
- 2The student spent ______their money working in the fields.
- 3they often think they _____(allow) to practice their hobbies as much as they want.肿么回答 为啥?
- 4气缸的夹紧力如何计算?
- 5there are many photos on the desk.（对many提问）
- 6设a,b,c,为实数,求证a平方+b平方+c平方 大于等于 ab+bc+ca
- 7一个盒子里有同样大小的红球3个,白球1个,篮球2个,黑球4个,如果摸50次,估计摸到篮球大约会有几次,黑球几次?
- 8小明家养了30只鸡,10只鸭,鸡的只数是鸭的只数的几倍?鸭的只数是鸡只数的几分之几?
- 9It color is biue哪里错了
- 10水管的直径怎么算?