一星期后就测验数学了啊!急求十字相乘法!最好举例子!
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![一星期后就测验数学了啊!急求十字相乘法!最好举例子!](/uploads/image/z/2764621-37-1.jpg?t=%E4%B8%80%E6%98%9F%E6%9C%9F%E5%90%8E%E5%B0%B1%E6%B5%8B%E9%AA%8C%E6%95%B0%E5%AD%A6%E4%BA%86%E5%95%8A%21%E6%80%A5%E6%B1%82%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E6%B3%95%21%E6%9C%80%E5%A5%BD%E4%B8%BE%E4%BE%8B%E5%AD%90%21)
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