6666X6666的简便方法是什么？

Question

如题所述

Answer 1

1、解：6666×6666

=2×3333×3×2222

=2×2222×3×3333

=4444×9999

=4444×(10000-1)

=4444×10000-4444

=44440000-4444

=44435556

2、解：6666x6666

＝39996000+3999600+399960+39996

＝40000000+4000000+400000+40000-4000-400-40-4

＝44440000-4444

＝44435556