Contact us
Choose a category below so we can get back to you as quickly as possible.
減法也有.减一個數就是加上這個數的相反數,向量也一樣,减一個向量就是加上這個向量的相反向量. 所以,你以後可以這樣認為,數學上只有加法和乘法,沒有減法和除法.減法就是加法,只不過是一個加的是正數.另一個加的是負數罷了.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.