1999+999²简便运算!一定要简算,不能胡蒙
问题描述:
1999+999²简便运算!
一定要简算,不能胡蒙
答
=1+1998+999²
=1+2×999+999²
=(1+999)²
=1000²
=1000000
答
1999+999²
=1999+(1000-1)²
=1999+1000²+1²-2*1000
=1000²
=1000000
答
1999+999²=1000+999+999²=1000+999*(1+999)=1000+999*1000=1000+999000=1000000
答
1999+999²
=1000+999+999²
=1000+999*(1+999)
=1000+999000
=1000000
答
1999+999²
=1000+999+999²
=1000+999*(1+999)
=1000+999*1000
=1000+999000
=1000000