Pre Algebra Review

Solving for x

100

4x = 16

4

200

x² = 64

x= 8        x= -8

300

2(x+4) = 10

1

400

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

-22

500

x(x+2)=8

x= 2      x= -4

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

Rewrite 9⁴ in expanded form

9 x 9 x 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

Expressions

100

5 times a number minus 5

5x - 5

200

The product of two different numbers

xy

300

4 less than x

x - 4

400

x added to 10 times x

10x + 10

or

10 + 10x

500

Solve x squared combined with the product of two and x if x=4

24