1. One-half of 26?

2. What number should you multiply 5 to get 30?

3.  $\frac{1}{6}\ of\ 36\ is\ equal\ to?$  

4. It is a fraction where the numerator is less than the denominator.

5. The young math student wants to learn more. He proceeds with his lessons. One of the most basic properties of math is demonstrated here. What is it called?

(80 x 4) x 2 = 80 x (4 x 2)