34X74,67X47,51X51有什么规律?

2025-02-27 06:33:42
推荐回答(1个)
回答1:

34X74
=(3x7+4)x100+4x4
=2500+16
=2516

67X47
=(6x4+7)x100+7x7
=3100+49
=3149
51X51
=(5x5+1)x100+1x1
=2600+1
=2601