会有理数的减法的数学高手进来下!教下我数学!算式:-3+5-7-9读作--------,也可读作 式子(+8)-(+9)+(-3)-(-9)+3省略加号可简写成------- 列式计算: (1):13的相反数,加
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![会有理数的减法的数学高手进来下!教下我数学!算式:-3+5-7-9读作--------,也可读作 式子(+8)-(+9)+(-3)-(-9)+3省略加号可简写成------- 列式计算: (1):13的相反数,加](/uploads/image/z/3014116-52-6.jpg?t=%E4%BC%9A%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%87%8F%E6%B3%95%E7%9A%84%E6%95%B0%E5%AD%A6%E9%AB%98%E6%89%8B%E8%BF%9B%E6%9D%A5%E4%B8%8B%21%E6%95%99%E4%B8%8B%E6%88%91%E6%95%B0%E5%AD%A6%21%E7%AE%97%E5%BC%8F%EF%BC%9A%EF%BC%8D3%EF%BC%8B5%EF%BC%8D7%EF%BC%8D9%E8%AF%BB%E4%BD%9C--------%2C%E4%B9%9F%E5%8F%AF%E8%AF%BB%E4%BD%9C+%E5%BC%8F%E5%AD%90%EF%BC%88%EF%BC%8B8%EF%BC%89%EF%BC%8D%EF%BC%88%EF%BC%8B9%EF%BC%89%EF%BC%8B%EF%BC%88%EF%BC%8D3%EF%BC%89%EF%BC%8D%EF%BC%88%EF%BC%8D9%EF%BC%89%EF%BC%8B3%E7%9C%81%E7%95%A5%E5%8A%A0%E5%8F%B7%E5%8F%AF%E7%AE%80%E5%86%99%E6%88%90-------+%E5%88%97%E5%BC%8F%E8%AE%A1%E7%AE%97%EF%BC%9A+%EF%BC%881%EF%BC%89%EF%BC%9A13%E7%9A%84%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E5%8A%A0)
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