Let's solve the equations step by step:

1. \( 1 + 4 = 5 \)

2. \( 9 - 2 \times 3 = 9 - 6 = 3 \)  
   (Remember, multiplication comes before subtraction due to the order of operations or PEMDAS/BODMAS rule).

3. \( (7 - 5) \times (3 + 1) = 2 \times 4 = 8 \)  
   (Solve the expressions inside the parentheses first, then multiply).

Final answers:
1. \( 1 + 4 = 5 \)
2. \( 9 - 2 \times 3 = 3 \)
3. \( (7 - 5) \times (3 + 1) = 8 \)

Would you like further details or explanations?

Here are 5 related questions to expand your understanding:
1. What is the order of operations in mathematics?
2. How do parentheses affect the outcome of an equation?
3. Can you solve \( 10 + 2 \times (6 - 4) \)?
4. What happens if there are multiple multiplication and division operations?
5. How would you simplify \( (8 - 3) + 4 \times 2 \)?

**Tip:** Always remember the order of operations: Parentheses, Exponents, Multiplication/Division (from left to right), Addition/Subtraction (from left to right).

Learn how to solve basic arithmetic problems using the order of operations (PEMDAS/BODMAS). This example includes problems like 1+4, 9-2×3, and (7-5)×(3+1), showcasing step-by-step solutions for students in Grades 4-6.

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