81除以99的2次方减121分之1
人气:206 ℃ 时间:2019-12-22 18:25:32
解答
原式=81/99*99-1/121
=9*9/9*9*11*11-1/11*11
=1/11*11-1/11*11
=0
推荐
猜你喜欢
- 客,货,轿车每时行60千米,50千米和70千米,客货车在A地轿车在B地三车同时出发相向而行轿车和客车相遇1时
- 修改病句,把正确的句子写在横线上.找到了走失的骆驼.,
- 7.X*X+2X+Y*Y-6Y+10=0,则xy=?
- 求关于:利润、利润率、成本(进价)、售价的数量关系,越多越好
- Tom and May are brother and sister .They always do homework t_____
- next two month,无比感激!
- 若给大肠杆菌加入抗青霉素的基因,大肠杆菌能产生青霉素吗?
- He paid 10 yuan for the book.同义句 He__10yuan__ __ the book.