Math 8 Review

Algebraic Equations

1

Solve for X: 

X + 8 = 25

x=17

2

Solve for X: 

X-3=10

X=13

3

Solve for X: 

4x=28

X=7

4

Solve for X: 

X=40

5

Solve for X:

2x + 5 = 17

X=6

Exponents

1

When you see the following expression, what is the big number called and what is the little number on top of it called?

2⁴

Big number - base number

little number - exponent or power

https://www.khanacademy.org/math/pre-algebra/pre-algebra-exponents-radicals/pre-algebra-exponents/v/introduction-to-exponents

2

How can you rewrite 9² in expanded form?

9 x 9

3

How can you rewrite the following in exponential form?

7 x 7 x 7 x 7 x 7 

7⁵

4

What is the value of:

3⁴

81

5

What is the value of:

2³ + 3² - 4²

1

https://www.khanacademy.org/math/pre-algebra/pre-algebra-exponents-radicals/pre-algebra-exponents/v/introduction-to-exponents

Order of Operations

1

Simplify the following expression:

62

https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/v/introduction-to-order-of-operations

2

Simplify the following expression:

5

https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/v/introduction-to-order-of-operations

3

3 + 4² * (3 + 2)

83

4

45

5

30

Adding Integers

1

-4 + -5

 -9

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

2

14 + -12

2

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

3

-10 + 15

5

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

4

-2 + -3 + 5

0

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

5

6 + (-2 + -5)

-1

Distributive Property

1

8(4+2) = ?

48

2

5(x - 3)

5x - 15

3

7 + 9(2x - 3)

18x - 20

4

-3(-x - 10)

3x + 30

5

x + 10 - 6(x - 3x) + 4

13x + 14

Adding Like Terms

1

Simplify: 

2x + 8x=

10x

2

Simplify: 

4x + 2x -8x

-2x

3

Simplify: 

-3x + 2x +5 -2

-x + 3

4

Simplify: 

-4x +2x -6 +3

-2x-3

5

Simplify: 

-2(x + 4) + 5x

-8 + 3x