1. One step equations using multiplication and division

2. ONE STEP EQUATIONS What you do to one side of the equation must also be done to the other side to keep it balanced. An equation is like a balance scale because it shows that two quantities are equal.

3. One way to solve an equation is to use inverse operations. An inverse operation is an operation that “undoes” another operation. Operation Inverse Operation AdditionSubtraction Addition Multiplication Division

4. 1) Solve. -5t = 60 To get the variable by itself, which number needs to be moved? -5 To move the -5, you have to do the opposite operation. What operation will we use? division

5. 1) Solve -5t = 60 -5 -5 t = -12 -5(-12) = 60 1.Draw “the river” to separate the equation into 2 sides 2.Divide both sides by -5 3.Check your answer

6. 2) Solve 15 = 6n 6 6 2.5 = n 15 = 6(2.5) 1.Draw “the river” 2.Divide both sides by 6 3.Check your answer

7. 3) Solve -3v = -129 1.v = -126 2.v = -43 3.v = 43 4.v = 126 Answer Now

8. 4) Solve You don’t like fractions? Let’s get rid of them! “Clear the fraction” by multiplying both sides of the equation by the denominator.

9. 4) Solve 4 · · 4 x = -48 1.Draw “the river” 2.Clear the fraction – multiply both sides by 4 3.Check your answer

10. 4) Solve -15 · · · (-15) x = 450 1.Draw “the river” 2.Clear the fraction multiply both sides by -15 3.Check your answer

11. Practice: Worksheet