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AppInventor如何选相反数？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
问：AppInventor如何选相反数？
答：使用“数学”中的“相反数”积木：
返回给定数字的负数，若给定负数则返回正数。如：8 返回 -8，-0.7 返回 0.7，0 则仍然返回 0。
文档：https://www.fun123.cn/reference/blocks/math.html#neg
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answered Mar 2 '11 at 16:15
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