数学中“A被B减”应该是A-B还是B-A?请说明推理过程.前14个回答中有10个是B-A,4个是A-B。我真的搞糊涂了,我原来本能地认为是A-B,就像蛙语蝉鸣解释的那样,可是有个朋友很坚定地认为是B-A
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