Pre Algebra Review

Solving for x

100

4x = 16

4

200

x² = 64

8, -8

300

2(x+4) = 10

1

400

4(x-3) = 5(x+2)

-22

500

x = number of secondary students at KIST

315

Exponents

100

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; little number = power

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

200

How can you rewrite 9² in expanded form?

9 x 9

300

How can you rewrite the following in exponential form?

7 x 7 x 7 x 7 x 7 

7⁵

400

What is the value of:

8⁴

4096

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

500

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

100

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

200

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

300

3 + 4² * (3 + 2)

83

400

45

500

30

Adding Integers

100

-4 + -5 + -165

 -174

200

14 + -12 + 12 - 10 + 9 + 3 + 3(0)

16

300

-10 + 15 - 9²

-76

400

-2 + 2(-3 + 5)

4

500

2³ + 3² - 4² +1³ - 3²

-7

Distributive Property

100

8(4+2) = ?

48

200

5(x-3)

5x-15

300

7+9(2x-3)

18x-20

400

-3(-x-10)

3x+30

500

Solve for x

-4y + 2x + 28 = 0

x = 2y - 14