Lesson 3: Practice Problems

Problem 1

Select all of the numbers that are greater than $- 5$ .

1.3
$- 6$
$- 12$
$\frac{1}{7}$
$- 1$
$- 4$

Problem 2

The table shows five states and the lowest point in each state.

Put the states in order by their lowest elevation, from least to greatest.

state	lowest elevation (feet)
California	$- 282$
Colorado	$3350$
Louisiana	$- 8$
New Mexico	$2842$
Wyoming	$3099$

California
Colorado
Louisiana
New Mexico
Wyoming

Problem 3

Here are the boiling points of certain elements in degrees Celsius:

List the elements from least to greatest boiling points.

Argon: -185.8
Chlorine: -34
Fluorine: -188.1
Hydrogen: -252.87
Krypton: -153.2

Problem 4

Decide which of the following quantities can be represented by a positive number and which can be represented by a negative number. Give an example of a quantity with the opposite sign in the same situation.

Tyler’s puppy gained 5 pounds.
The aquarium leaked 2 gallons of water.
Andre received a gift of $10.
Kiran gave a gift of $10.
A climber descended 550 feet.

Problem 5

On the number line, label the points that are 4 units away from 0.
If you fold the number line so that a vertical crease goes through 0, the points you label would match up. Explain why this happens.
On the number line, label the points that are $\frac{5}{2}$ units from 0. What is the distance between these points?