Lesson 1
Interpreting Negative Numbers
Problem 1
It was \(\text 5 ^\circ \text{C}\) in Copenhagen and \(\text 12 ^\circ \text{C}\) in Oslo. Which city was colder?
Solution
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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?
Solution
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Problem 3
Compare using >, =, or <.
 3 _____ 3
 12 _____ 24
 12 _____ 24
 5 _____ (5)
 7.2 _____ 7
 7.2 _____ 7
 1.5 _____ \(\frac {\text{}3}{2}\)
 \(\frac {\text{}4}{5}\) _____ \(\frac {\text{}5}{4}\)
 \(\frac {\text{}3}{5}\) _____ \(\frac {\text{}6}{10}\)
 \(\frac {\text{}2}{3}\) _____ \(\frac13\)
Solution
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Problem 4
Han wants to buy a $30 ticket to a game, but the preorder 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?
Solution
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(From Unit 4, Lesson 7.)Problem 5
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 a different shade of green that is bluer.

Find a mixture that will make a different shade of green that is more yellow.
Solution
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(From Unit 2, Lesson 1.)