Math 8

Scientific Notation

100

Write in Scientific Notation:

4,200,000,000

4.2 x 10⁹

200

Write in Standard Decimal Notation

3.02 x 10⁵

302,000

300

Write in Scientific Notation:

0.0000024

2.4 x 10⁶

400

Write in Scientific Notation:

30,200,000,000,000

3.02 x 10¹³

500

Compare: 

Which is greater:

4.02 x 10^-6 or 4,200,000

4,200,000 > 4,020,000

Real Numbers

100

What are the two types of Real Numbers

Rational and Irrational

200

Name an irrational number

answers will vary

300

Which of the following is a natural number:

4/2, -3, 0, 1/2

4/2

400

Put in order from least to greatest:

4.5 x 10^-2, 0.045, 1/20, -3

-3, 4.5 x 10^-2, 0.045, 1/20 

500

Which are NOT an integers?

2/5,  10/5, -2,  -0.5, 9, 0 

2/5, -0.5

Solving Equations

100

2y + 6 =28

y = 11

200

8 + x/5 = -2

x=-10

300

2c -2 + c = -4

c= -2/3

400

2x + 3 = 3x -5

x = 8

500

5 (x+ 2) = 3x - 8

-35

Square Roots

100

Find the square root of 196

14

200

Find the square root of 625

25

300

Estimate the square root of 89 to two decimal places

9.42

400

Estimate the square root of 125 to two decimal places

11.17

500

Estimate the square root of 230 to two decimal places

15.16

Pythagorean Theorem

100

Find the hypotenuse of a triangle with sides of 10 and 24

26

200

A right triangle has a hypotenuse of 17, and a side of 15. What is the length of the other side?

8

300

Find the distance between points (25,7) and (1,0)

25

400

Find the distance between points (5,5) and (-5,-5)

14.1

500

Lupe wants to use a fence to divide her square garden in half diagonally. If each side of the garden is 16 ft long, how long will the fence have to be? Round to two decimal points

22.62