Exercise 1: Fill the boxes with the correct number. 1. 1/2 = ?/8 2. 1/2 = ?/4 4. 4/8 = ?/2 5. 2/4 = ?/8

$$1 \times 4 = 4$$

So, the missing number is 4.

$$\frac{1}{2} = \boxed{\frac{4}{8}}$$

2)

$$1 \times 2 = 2$$

So, the missing number is 2.

$$\frac{1}{2} = \boxed{\frac{2}{4}}$$

4)

$$4 \div 4 = 1$$

So, the missing number is 1.

$$\frac{4}{8} = \boxed{\frac{1}{2}}$$

5)

$$2 \times 2 = 4$$

So, the missing number is 4.

$$\frac{2}{4} = \boxed{\frac{4}{8}}$$