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Algebra II
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Algebra II

Algebra II

By Monica Yuskaitis

Slide 2

Definitions

Definitions

Equation A mathematical sentence stating that 2 expressions are equal.

12 3 = 9

8 + 4 = 12

Slide 3

Definitions

Definitions

Equation A mathematical sentence with an equals sign.

16 5 = 11

14 + 3 = 17

Slide 4

Definitions

Definitions

Equals Sign (=) Means that the amount is the same on both sides.

4 + 2 = 6

5 2 = 3

Slide 5

An Equation is like a balance scale. Everything must be equal on both sides.

An Equation is like a balance scale. Everything must be equal on both sides.

10

5 + 5

=

Slide 6

When the amounts are equal on both sides it is a true equation.

When the amounts are equal on both sides it is a true equation.

12

6 + 6

=

Slide 7

When the amounts are unequal on both sides it is a false equation.

When the amounts are unequal on both sides it is a false equation.

8

2 + 2

=

Slide 8

When an amount is unknown on one side of the equation it is an open equation.

When an amount is unknown on one side of the equation it is an open equation.

7

n + 2

=

Slide 9

When you find a number for n you change the open equation to a true equation. You solve the equation.

When you find a number for n you change the open equation to a true equation. You solve the equation.

7

n + 2

=

5

Slide 10

Are these equations true, false or open?

Are these equations true, false or open?

11 - 3 = 5

13 + 4 = 17

N + 4 = 7

12 3 = 8

3 + v = 13

15 6 = 9

false

true

open

false

open

true

Slide 11

Definitions

Definitions

Inverse operation the opposite operation used to undo the first.

4 + 3 = 7 7 4 = 3

6 x 6 = 36 36 / 6 = 6

Slide 12

How to solve an addition equation

How to solve an addition equation

Use the inverse operation for addition which is subtraction

m + 8 = 12 12 - 8 = 4

m = 4 4 + 8 = 12

Slide 13

How to solve a subtraction equation

How to solve a subtraction equation

Use the inverse operation for subtraction which is addition

m - 3 = 5 5 + 3 = 8

m = 8 8 - 3 = 5

Slide 14

Solve these equations using the inverse operations

Solve these equations using the inverse operations

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