 Multiplying & Dividing Algebra~ Lesson 6 Remember Addition and Subtraction? Kinda the same idea…

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Multiplying & Dividing Algebra~ Lesson 6

Remember Addition and Subtraction? Kinda the same idea…

Except now, we are working with multiplication and division. Remember… They are opposites. So they undo each other.

Remember… In Algebra, we have to do a little organizing before we can solve for the right answer.

You know, put like things together on the same side of the equation.

4x = 24 Imagine a dividing line through the equal sign. Remember…

4x = 24 Remember… Letters go on one side and numbers go on the other. L#L#

4x = 24 L#L# Notice that it is tied to the X by multiplication. How can you undo multiplication? DIVISION!

4x = 24 L#L# 4 The division undoes the multiplication on this side, so the four is cancelled out.

4x = 24 L#L# 4 What you do to one side of the equation, you must do to the other.

4x = 24 L#L# 4 What you do to one side of the equation, you must do to the other. x = 6

Lets try a few… 3m = 12 36 = 3j 5s = 135 m = 4 13 = j s = 27

Now…lets undo division!

x = 24 Imagine a dividing line through the equal sign. Remember… 2

x = 24 2 Notice that it is tied to the X by division. How can you undo division? MULTIPLICATION! 2

x = 24 2 2 The division undoes the multiplication on this side, so the four is cancelled out.

x = 24 2 2 The division undoes the multiplication on this side, so the four is cancelled out.

x = 24 2 2 The division undoes the multiplication on this side, so the four is cancelled out. x = 48

Lets try a few… m = 5 6 10 = w 3 m = 30 30 = w

Homework Time!

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