Which of these is the smallest?

$$\frac{2+3}{4+6}\hspace{30mm}\frac{2\div3}{4\div6}\hspace{30mm}\frac{23}{46}\hspace{30mm}\frac{2-3}{4-6}\hspace{30mm}\frac{2\times3}{4\times6}$$

You can find more short problems, arranged by curriculum topic, in our short problems collection.