Your teacher will give you a set of cards. Take turns with your partner to match two expressions with the same value.

1. For each match that you find, explain to your partner how you know it’s a match.
2. For each match that your partner finds, listen carefully to their explanation. If you disagree, discuss your thinking and work to reach an agreement.

1. For each set of values for and , evaluate the given expressions, and record your answers in the table.

   	6
   	-6
   -6

2. When and , which expression:

   has the largest value?

   has the smallest value?

   is the closest to 0?

3. When and , which expression:

   has the largest value?

   has the smallest value?

   is the closest to 0?

4. When and , which expression:

   has the largest value?

   has the smallest value?

   is the closest to 0?

A vertical number line with the number zero indicated is labeled “vertical position in meters." On the number line, "a" is high above zero, "b" is slightly below zero and a horizontal line extends to the right at zero. A seagull has the vertical position of “a” and a shark has the vertical position of "b."

A seagull has a vertical position , and a shark has a vertical position . Draw and label a point on the vertical axis to show the vertical position of each new animal.

1. A dragonfly at , where

2. A jellyfish at , where

3. An eagle at , where

4. A clownfish at , where

5. A vulture at , where

6. A goose at , where