81×81+81×38+19×19的简便方法是什么？

Question

如题所述

Answer 1

计算器

Answer 2

81×81+81×38+19×19
=81×81+2×81×19+19×19
=(81+19)²
=100²
=10000本回答被提问者采纳

Answer 3

81×81+81×38+19×19
=81×81+2×81×19+19×19
=(81+19)×2
=100×2
=10000

Answer 4

81×81+81×38+19×19
=81×81+2×81×19+19×19
=(81+19)²
=100²
=10000

Answer 5

81*81+2*81*19+19*19
=(81+19)^2
=100^2
=10000