math/知识点/除法.md
2022-08-12 17:10:13 +08:00

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# 除法
$\forall (a,b,x,y)\in\mathbb{Z} \land x\neq0, y={a}{x}+b \iff {y}\div{x}={a}\cdots{b}$
$y$称为<u>被除数</u>$x$称为<u>除数</u>$a$称为<u></u>$b$称为<u>余数</u>
当$b=0$时称$y$整除$x$,或称$y$是$x$的倍数。此时有$y\div{x}=a \Longrightarrow y\div{a}=x$。