<s>[INST] How to divide using addition or subtraction We can multiply $a$ and $n$ by adding $a$ a total of $n$ times. 
$$ n \times a = a + a + a + \cdots +a$$
Can we define division similarly using only addition or subtraction?
 [/INST] To divide $60$ by $12$ using subtraction:
$$\begin{align*}
&60-12=48\qquad\text{count }1\\
&48-12=36\qquad\text{count }2\\
&36-12=24\qquad\text{count }3\\
&24-12=12\qquad\text{count }4\\
&12-12=0\qquad\;\text{ count }5\;.
\end{align*}$$
Thus, $60\div 12=5$.
You can even handle remainders:
$$\begin{align*}
&64-12=52\qquad\text{count }1\\
&52-12=40\qquad\text{count }2\\
&40-12=28\qquad\text{count }3\\
&28-12=16\qquad\text{count }4\\
&16-12=4\qquad\;\text{ count }5\;.
\end{align*}$$
$4<12$, so $64\div 12$ is $5$ with a remainder of $4$.
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