è² ã®æ°ã®ã-ãã¯è±èªã§ããã¬ãã£ããï¼-1 is called Minus One, not Negative One, in Japan In Japan, we call -1 "minus one," but my kids call it "negative one." "Isn't that minus one ?" I asked them, then they said "No, 'minus' is for subtraction. Our teacher told us to distinguish negative numbers and the operation of subtraction." Hmnn, that makes sense. Dr. Math says so, too. ex. 5 - (-7) = -2 Japanese school kids:
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