Loading...

PPT – 6'2 Solving Multiplication and Division Equations PowerPoint presentation | free to download - id: 2082d4-NmU4M

The Adobe Flash plugin is needed to view this content

6.2 Solving Multiplication and Division Equations

- LPS

What Youll learn

- Youll learn to solve multiplication and

division equations - Division Property of Equality
- Multiplication Property of Equality

Division Property of Equality

- Words If you divide the same nonzero (why non

zero?)number from each side of an equation, then

the two sides remain equal. - Symbols Arithmetic Algebra
- 88 ab
- 8 8 a b
- 2 2

c c

Multiplication Property of Equality

- Words If you multiply the same number to each

side of an equation, then the two sides remain

equal. - Symbols Arithmetic Algebra
- 55 ab
- 5 x 4 5 x 4 ac bc

Examples

- The opposite of multiplying is dividing, so

divide both sides by 7. - 7divided by 7 is 1, so the 7s cancel out.

-54 9c 9 9 -6 c Check -54

9c -54 9-6 -54 -54

- 7C 49
- 7 7
- C 7
- Check
- 7C 49
- 77 49
- 49 49

To check replace the variable with your answer

and see if the equation still works.

?

?

-10x -120 -10 -10 x 12

4.5 5 z 5 5 .9 z

Check

-10 x -120 -10(12) -120 -120 - 120

4.5 5z 4.5 5 (.9) 4.5 4.5

?

?

The opposite of dividing by 4 is to multiply by

4. You have to do the same thing to both sides

of the equation to keep it balanced. 4 divided

by 4 is 1, so the 4s cancel each other out.

4 4

X 48

Check

7 7

7 7

X -84

X -70

Check

-10 -10

-12 -12

5 5

-1 p - 55

5 5

-1 -1

- K 60

1

p 55

-1 -1

K -60

- Multiply both sides by the reciprocal of the

fraction. - Cancel out the 5s and 4s.
- Put the 1 under the whole number
- Multiply

Check

1

1

Assignment p. 236 11-30 Worksheet E 73 7 E 74