不改变原式的值,将7-(+2)-(-9)+(-1)中的减法改为加法并写成省略加号和的原式是()A7-2-9+1B7-2-9-1C7-2+9+1D7-2+9-1下列各式可以写成A-B+C的是()A A-(+B)-(+C)B A-(+B)-(-C)C A+(-B)+(-C
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 14:56:53
![不改变原式的值,将7-(+2)-(-9)+(-1)中的减法改为加法并写成省略加号和的原式是()A7-2-9+1B7-2-9-1C7-2+9+1D7-2+9-1下列各式可以写成A-B+C的是()A A-(+B)-(+C)B A-(+B)-(-C)C A+(-B)+(-C](/uploads/image/z/13381778-2-8.jpg?t=%E4%B8%8D%E6%94%B9%E5%8F%98%E5%8E%9F%E5%BC%8F%E7%9A%84%E5%80%BC%2C%E5%B0%867-%EF%BC%88%2B2%EF%BC%89-%EF%BC%88-9%EF%BC%89%2B%EF%BC%88-1%EF%BC%89%E4%B8%AD%E7%9A%84%E5%87%8F%E6%B3%95%E6%94%B9%E4%B8%BA%E5%8A%A0%E6%B3%95%E5%B9%B6%E5%86%99%E6%88%90%E7%9C%81%E7%95%A5%E5%8A%A0%E5%8F%B7%E5%92%8C%E7%9A%84%E5%8E%9F%E5%BC%8F%E6%98%AF%EF%BC%88%EF%BC%89A7-2-9%2B1B7-2-9-1C7-2%2B9%2B1D7-2%2B9-1%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E5%8F%AF%E4%BB%A5%E5%86%99%E6%88%90A-B%2BC%E7%9A%84%E6%98%AF%EF%BC%88%EF%BC%89A+A-%EF%BC%88%2BB%EF%BC%89-%EF%BC%88%2BC%EF%BC%89B+A-%28%2BB%29-%EF%BC%88-C%EF%BC%89C+A%2B%EF%BC%88-B%EF%BC%89%2B%EF%BC%88-C)
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