Use mental math to find the equation that are true. Select all that apply

Let's evaluate each equation one by one:

1. 400 ÷ 80 = 50
   This is incorrect; \(400 ÷ 80 = 5\).

2. 4,000 ÷ 80 = 5
   This is incorrect; \(4,000 ÷ 80 = 50\).

3. 400 ÷ 8 = 50
   This is correct; \(400 ÷ 8 = 50\).

4. 40,000 ÷ 800 = 50
   This is correct; \(40,000 ÷ 800 = 50\).

5. 40,000 ÷ 80 = 500
   This is correct; \(40,000 ÷ 80 = 500\).

Based on the evaluations, the true equations are:

• 400 ÷ 8 = 50
• 40,000 ÷ 800 = 50
• 40,000 ÷ 80 = 500