Math Review

Angles & Triangles

100

What are all angles in a triangle equal to 

180degress

200

If you have a triangle with a extended external angle of 121, and one of the opposite interior angles equaling 47 degress. What would the bottom right angle equal to?

74

300

If you have a right triangle with a leg of 12in and a hypotenuse of 16in , what is the other legs measurement?

the square root of 112 or 10.58in

400

What is the sum of the measures of all the angles in a regular decagon (ten sided figure)?

1440

(n-2)(180)

500

How many sides are there in a convex polygon that has the sum of all its interior angles 16. equal to 1260°?

9 sides

Use the formula for the sum of the interior angles of a polygon to find the number of sides. 

(n-2)(180)=1260 and solve for n.

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 number

little number - exponent or 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

3

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

12

Adding Integers

100

-4 + -5

 -9

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

200

14 + -12

2

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

300

-10 + 15

5

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

400

-2 + -3 + 5

0

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

500

6 + (-2 + -5)

-1

Order of Operations

100

8(4+2) = ?

48

200

5(10 - 3)

35

300

7 + 9(2 - 3)

-2

400

-3 x 4 + (5 -2)

-9

500

5^{2 +} 3 - 30

-2

Fractions, %, and decimals

100

which is largest, 25%, 0.027, or 2/5?

25%

200

Which is smallest, .23, 22%, or 1/5?

1/5

300

what is 236% written as a decimal?

2.36

400

what is 4/5 written as a percent?

80%

500

What is 0.34 written as a fraction?

34/100 or 17/50