(1)999^2 (2).0.5^100x4^101 用简便方法
问题描述：
(1)999^2 (2).0.5^100x4^101 用简便方法
答
(1)999^2
999^2=(1000-1)^2=1000^2-2x1000x1+1=1000000-2000+1=998001
(2).0.5^100x4^101
0.5^100x4^101=0.5^100x4^100x4=(0.5x4)^100x4=2^100x2^2=2^102第二题是不是错了= =对的还有[(a^5)^4÷a^12]^2÷a^4等于多少0.5^100x4^101=0.5^100x4^100x4=(0.5x4)^100x4=2^100x2^2=2^102区别:0.25^100x4^101=0.25^100x4^100x4=(0.25x4)^100x4=1^100x4=4哦，原来如此，