Solving Addition Equations Using Inverse Operations

This lesson teaches how to solve one-step addition equations using inverse operations. It explains that the inverse of addition is subtraction, which can be used to undo addition. The concept is demonstrated with an example, starting with a number, adding to it, and then subtracting to return to the original number. The lesson then applies this concept to solve an equation, showing how to keep the equation balanced by subtracting from both sides. The solution is verified by substituting the value back into the equation. The lesson concludes by summarizing the process of using inverse operations to solve equations.

What is the inverse operation of addition?

• Addition

• Multiplication

• Division

• Subtraction

If you start with the number 4 and add 6, what is the result?

• 12

• 14

• 10

• 8

In the equation X + 5 = 8, what operation should be performed to isolate X?

• Subtract 5 from both sides

• Divide both sides by 5

• Add 5 to both sides

• Multiply both sides by 5

What is the value of X in the equation X + 5 = 8?

• 4

• 5

• 3

• 2

How can you verify that the solution X = 3 is correct for the equation X + 5 = 8?

• By checking if 3 + 5 equals 8

• By checking if 3 - 5 equals 8

• By checking if 3 / 5 equals 8

• By checking if 3 * 5 equals 8