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The given expression is \( 20 \div 5 - 4 + 6 \). 

To solve this expression, follow the order of operations (PEMDAS):
1. **Parentheses**
2. **Exponents**
3. **Multiplication and Division** (from left to right)
4. **Addition and Subtraction** (from left to right)

### Step-by-step:
1. First, perform the division: 
   \[
   20 \div 5 = 4
   \]
2. Then, proceed with the subtraction: 
   \[
   4 - 4 = 0
   \]
3. Lastly, perform the addition:
   \[
   0 + 6 = 6
   \]

Thus, the value of the expression is **6**.

The correct choice is:
- \( \boxed{6} \).

Would you like further explanation on the steps or any specific details? 

Here are 5 related questions for practice:
1. What is the result of \( 48 \div 8 + 6 - 2 \)?
2. How does the order of operations affect the result of \( 7 + 3 \times 2 \)?
3. If an expression has no parentheses, how do you decide what to calculate first?
4. What happens if we change the division in \( 20 \div 5 \) to multiplication?
5. What is the result of \( 12 + 18 \div 6 - 3 \)?

**Tip:** Always remember to handle division and multiplication from left to right before moving to addition and subtraction in a given expression.

Learn how to solve the arithmetic expression 20 ÷ 5 - 4 + 6 using the order of operations (PEMDAS). This step-by-step guide is suitable for students in Grades 5-7 and covers basic arithmetic rules.

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