简便计算 999^2
人气:440 ℃ 时间:2020-04-30 02:17:58
解答
=(1000-1)²
=1000000-2000+1
=998001 .
推荐
猜你喜欢
- 如果2X-Y=10,求代数式[(X²+Y²)-(X-Y)²+2Y(X-Y)]÷4Y
- Would you like a cake with some fruit?Yes,and I'd like one with some ( ).
- 父子两人同时从A点出发,沿着长方形ABCD的操场背向而行,父亲的速度是儿子
- 分号有哪些用法?
- 有一个班,请假人数是出勤人数的1/9,中途又有人离开.请假的人数是出勤人数的3/22.这个班共有多少人?
- Cultivate a workplace with a specific look and
- Does she like pears?AYes,she do B Yes,she like C
- 我会用一点全站仪,就基本的放点,防线.