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999乘111加3333乘667 和 1001乘1001减1001 这两个用简便算····很急啊······
人气:552 ℃ 时间:2024-05-04 13:21:28
解答

999乘111加333乘667
= 333乘3乘111加333乘667
= 333乘333加333乘667
=333乘(333+667)
=333乘1000
=333000
1001乘1001减1001
=1001乘(1001-1)
=1001乘1000
=1001000

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