> 数学 >
999×999+998×998=?
hadfi
人气:356 ℃ 时间:2020-03-23 05:09:30
解答
999*999+998*998 = 1 994 005
(1000-1)^2 + (1000-2)^2
= 1000000 - 2000 +1 +1000000 -4000 +4
=1994005
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版