8th Grade Math Unit 1 and 2

Comparing Rational Numbers

100

Put 1/2, 2/3, 1/3 in order from least to greatest.

1/3, 1/2, 2/3

200

What is a rational number less than 3/4?

2/9

300

Which is greater? 14.999... or 75/5?

75/5

400

Which one is irrational .343434... or .5648936...?

.5648936...

500

Write a fraction between 2/5 and 3/4.

Anything between .4 and .75

Rational or Irrational Numbers

100

What is the most popular irrational number?

Pi

200

2.44444.. is irrational?

No

300

Write a square root that is rational.

perfect square root answers

400

Write a squre root that is irrational.

Any number that is not a perfect square answer.

500

Does the decimal .755555... convert to 34/45?

Yes

Scientific Notation

100

Write 1,700 in scientific notation.

1.7 x 10^3

200

Write .000000405 in scientific notation.

4.05 x 10^-7

300

Write .00010072 in scientific notation.

1.0072 x 10^-4

400

Write 24000000 in scientific notation.

2.4 x 10^7

500

What does the number above the 10 mean?

the number of times you move your decimal

Scientific Notation Operations

100

2.3 x 10⁴ + 4.16 x 10⁷

4.1623 x 10⁷

200

6.07 x 10^-1 - 4.52 x 10^-2

5.618 x 10^-1

300

3.2 x 10⁴ / 1.6 x 10²

2 x 10²

400

(2.08 x 10^-7) (8.1 x 10^-5)

1.6848 x 10^-11

500

5.4x10² / 1.2 x 10^-1

4.5 x10³

MAD

100

What does MAD stand for?

What is mean absolute deviation

200

What is the MAD for the following data set;

{10, 13, 7, 10, 8}

What is 1.68?

300

What is the MAD of the following data set:

{290, 400, 300, 330, 280, 360, 330, 390, 300, 250, 400}

What is 41.8?

400

What is the MAD of the following data set (nearest thousandth);

{19.1, 20.1, 20.9, 19.6, 20.9}

What is 0.624?

500

Find the MAD of both data sets and determine which has the lowest variation.

Data Group 1:

{5.8, 6.1, 5.5, 6.6, 7.3, 5.9, 6.3, 5.7, 6.8, 7.1}

Data Group 2:

{7.7, 7.4, 5.4, 7.8, 6.1, 5.2, 7.5, 7.9, 6.3, 5.6}

Data Group 1: 0.5

Data Group 2: 1

What is Data Group 1 has less variation.