Lesson 1: Practice Problems

Problem 1

It was $- 5^{\circ} C$ in Copenhagen and $- 12^{\circ} C$ in Oslo. Which city was colder?

Problem 2

A fish is 12 meters below the surface of the ocean. What is its elevation?
A sea bird is 28 meters above the surface of the ocean. What is its elevation?
If the bird is directly above the fish, how far apart are they?

Problem 3

Compare using >, =, or <.

$3$ $- 3$
$12$ $24$
$- 12$ $- 24$
$5$ $- (- 5)$
$7.2$ $7$
$- 7.2$ $- 7$
$- 1.5$ $\frac{- 3}{2}$
$- \frac{4}{5}$ $- \frac{5}{4}$
$\frac{- 3}{5}$ $\frac{- 6}{10}$
$\frac{- 2}{3}$ $\frac{1}{3}$

Problem 4 From Unit 4 Lesson 7

Han wants to buy a $30 ticket to a game, but the pre-order tickets are sold out. He knows there will be more tickets sold the day of the game, with a markup of 200%. How much should Han expect to pay for the ticket if he buys it the day of the game?

Problem 5 From Unit 2 Lesson 1

A type of green paint is made by mixing 2 cups of yellow with 3.5 cups of blue.

Find a mixture that will make the same shade of green but a smaller amount.
Find a mixture that will make the same shade of green but a larger amount.
Find a mixture that will make the different shade of green that is bluer.
Find a mixture that will make the different shade of green that is more yellow.