Assume m is a non-zero integer. Draw a line from the expression on the left to the Circle of Evaluation on the right.
Note: Some expressions have more than one correct Circle of Evaluation!
| Words | Circle of Evaluation | |||
|---|---|---|---|---|
| - m| |
1 |
A |
(abs (negate m))
|
|
- |m| |
2 |
B |
(negate (abs m))
|
|
- ( - m) |
3 |
C |
(negate (negate m))
|
|
- m |
4 |
D |
(negate (abs -m))
|
|
- | - m | |
5 |
E |
(negate m)
|
|
F |
(negate -m)
|
|||
G |
(abs -m)
|
6 Look at the expressions in the matching activity above. Are any of them always positive, no matter what we substitute in for m?
7 Are any of the above expressions always negative?
8 Are there any expressions that were neither always positive nor always negative? Why? Explain.
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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