Test questions on understanding inverse operations (addition/subtraction)

📚 Quick Study Guide

• ➕ Addition: Combining two or more numbers to find their total sum. For example, $3 + 5 = 8$.
• ➖ Subtraction: Finding the difference between two numbers. For example, $7 - 2 = 5$.
• 🔄 Inverse Operations: Operations that undo each other. Addition and subtraction are inverse operations.
• 💡 Using Inverse Operations to Solve Equations: If you have an equation like $x + 4 = 9$, you can subtract 4 from both sides to find $x$: $x = 9 - 4 = 5$.
• 🔑 Key Principle: Whatever you do to one side of an equation, you must do to the other side to maintain balance.

📝 Practice Quiz

1. What is the inverse operation of adding 7?
1. A. Multiplying by 7
2. B. Dividing by 7
3. C. Subtracting 7
4. D. Adding 7
2. Solve for $x$: $x + 3 = 10$
1. A. $x = 13$
2. B. $x = 7$
3. C. $x = 30$
4. D. $x = -7$
3. What is $15 - 8$? This demonstrates what type of operation?
1. A. 23, Addition
2. B. 7, Subtraction
3. C. 7, Addition
4. D. 23, Subtraction
4. Solve for $y$: $y - 5 = 2$
1. A. $y = 3$
2. B. $y = -3$
3. C. $y = 10$
4. D. $y = 7$
5. Which equation demonstrates the inverse operation to solve for $z$ in $z - 12 = 5$?
1. A. $z = 5 - 12$
2. B. $z = 12 - 5$
3. C. $z = 5 + 12$
4. D. $z = -5 - 12$
6. What number, when added to 6, equals 14?
1. A. 20
2. B. 6
3. C. 7
4. D. 8
7. What is the result of performing the inverse operation to solve $a + 9 = 16$?
1. A. $16 + 9 = 25$
2. B. $9 - 16 = -7$
3. C. $16 - 9 = 7$
4. D. $9 + 16 = 25$