Unit 1 Review

VOCABULARY

100

A real number that CANNOT be written as a fraction (ratio)

What is an Irrational Number?

200

A number that can be positive or negative. Ex) 2, 1, 0, -1, -2, -3

Integer

300

A small number written to the right and above a base number (other names are index and power)

Exponent

400

A number that CAN be written as a fraction (ratio).

What is a rational number?

500

Can a number be both rational and irrational? WHY?

NO because a number can't be able to change into a fraction AND not be able to turn in to a fraction.

Irrational Numbers (8.2B)

100

Estimate the value of the square root of 61

What is 7.81?

200

What two whole numbers does the square root of 39 fall between?

6 and 7

300

Luis is painting a square wall. The area of the wall is 85 in squared. What is the side length of the wall?

9.2 inches

400

Write a number that would fit in place of x.

23%<x<1/2

multiple answers

500

Which number is NOT considered to be irrational?

A. Square Root of 10

B. Square Root of 49

C. Square Root of 3

D. Square Root of 2

B. square root of 49

Scientific Notation (8.3C)

100

True or False

.00045 x 10^-4 is in correct scientific notation.

False.  The first factor is not in scientific notation, in which their is 1 number greater than 0 before the decimal.

200

How is 2.14 x 10^-5 written in standard notation?

A) .0214

B) .0000214

C) .00214

D) .00000214

B) .0000214

300

How is 36,300,000 written in scientific notation?

A. 3.63 x 10⁴

B. 3.63 x 10⁷

C. 3.63 x 10⁸

D. 3.63 x 10²

B. 3.63 x 10⁷

400

Which is equivalent to 8.03 x 10^-8?

A. -803,000,000

B. -0.0000000803

C. 0.0000000803

D. 803,000,000

C. 0.0000000803

500

Which of the following is equivalent to 5,710,900?

a. 5.7109 x 10^-6

b. 5.7109 x 10²

c. 5.7109 x 10³

d. 5.7109 x 10⁶

D. 5.7109 x 10⁶

Ordering Numbers (8.2D)

100

True or False

The first step in ordering numbers is to convert them to decimals?

TRUE

200

TRUE FALSE

-10 > 5

False (-10 is smaller)

300

Order these numbers in ascending order?

-12, 5.2, 25%, -12.5

-12.5, -12, 25%, 5.2

400

Order these numbers in descending order.

-13.5%,   -12/4,  pi,  7.45,  14%, square root 36.

7.45, square root 36, pi, 14%, -13.5%, -12/4

500

What is the correct order of the following numbers from least to greatest?

0.89, 3/4, 98%, 4/5

A. 4/5, 3/4, 98%, 0.89

B. 3/4, 4/5, 98%, 0.89

C. 3/4, 4/5, 0.89, 98%

D. 98%, 0.89, 4/5, 3/4

C. 3/4, 4/5, 0.89, 98%