Inverse Operations

Inverse Operations

What are inverse operations?

• Inverse means opposite.

• When we use inverse operations to solve for a variable, we need to use the opposite operation of the one being used in the equation.

• Addition and Subtraction are opposites.

• Multiplication and Division are opposites.

Solving equations

• To solve for a variable, we need to get the variable by itself on one side of the equal side.

• To get rid of the numbers with the variable, we use inverse operations on both sides of the equal sign.

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Poll

What's the inverse operation of addition?

• Subtraction

• Multiplication

• Division

Poll

What should you do to solve: x+7=25

• add 7 on both sides

• add 25 on both sides

• subtract 7 on both sides

• subtract 25 on both sides

Poll

What should you do to solve: x+42=-96

• add 42 on both sides

• add -96 on both sides

• subtract 42 on both sides

• subtract -96 on both sides

Multiple Choice

Solve the equation: x+4=23

• 27

• 19

• 92

• 5.75

Poll

What's the inverse operation of multiplication?

• addition

• subtraction

• division

Poll

What should you do to solve: 5x=65

• multiply by 5 on both sides

• multiply by 65 on both sides

• divide by 5 on both sides

• divide by 65 on both sides

Poll

What should you do to solve: 12h=84

• multiply by 12 on both sides

• multiply by 84 on both sides

• divide by 12 on both sides

• divide by 84 on both sides

Multiple Choice

Solve the equation: 11k=99

• 110

• 88

• 9

• 1,089

Poll

What's the inverse operation of subtraction?

• addition

• multiplication

• division

Poll

What should you do to solve: w-7= 24

• add 7 on both sides

• add 24 on both sides

• subtract 7 on both sides

• subtract 24 on both sides

Poll

What should you do to solve: y-15=-37

• add 15 on both sides

• add 37 on both sides

• subtract 15 on both sides

• subtract 37 on both sides

Multiple Choice

Solve the equation: t-3=12

• 15

• 9

• 36

• 4

Poll

What's the inverse operation of division?

• addition

• subtraction

• multiplication

Poll

What should you do to solve: y/6=-11

• multiply by 6 on both sides

• multiply by -11 on both sides

• divide by 6 on both sides

• divide by -11 on both sides

Poll

What should you do to solve: x/4=23

• multiply by 4 on both sides

• multiply by 23 on both sides

• divide by 4 on both sides

• divide by 23 on both sides

Multiple Choice

Solve the equation: t/3=9

• 12

• 6

• 3

• 27