55x66＋66x77＋77x88＋88x99
来自=11x5x11x6+11x6x11x7+11x7x11x8+11x8x11x9
=11x11x(5x6+下环通它兰些官象6x7+7x8+8x9)
=121x(30+42+56+72)
=121x200
=24200
希望能帮到你!
55x66＋66x77＋77x88＋88x99?用最简单的方法计算
Simone
发布于 2024-09-09 08:05:07
531 阅读
