123456,1234567,12345678,123456789添加符号等于一?

学习时间:2026-08-13 13:30:57 阅读：5187

123456,1234567,12345678,123456789添加符号等于一?阿,谢谢,要赶快!

勤奋的大树

2026-08-13 13:30:57

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1。(2-1)x(3-4)x(6-5)=12。(3-2-1)+(5-4)x(7-6)=13。(2-1)x(4-3)x(6-5)x(8-7)=14。(3-2-1)+(5-4)x(7-6)x(9-8)=1