For each of the expressions in words, look at the Circles of Evaluation that Claire and Walker drew. Then, decide who is correct: Claire, Walker, or both? Justify your response.
| Expression in words: | Claire’s Circle: | Walker’s Circle: | Who is correct? Justify. | |
|---|---|---|---|---|
1 |
Find the quotient of 15 and 5. Multiply it by 6. |
(* (/ 15 5) 6)
|
(* (/ 5 15) 6)
|
|
2 |
Double 8. Now add 7. |
(+ (* 2 8) 7)
|
(+ 7 (* 2 8))
|
|
3 |
5 less than the product of 5 and 20. |
(- 5 (* 5 20))
|
(- (* 20 5) 5)
|
|
4 |
One half of the quotient of 36 and 9. |
(* 1/2 (/ 36 9))
|
(* (/ 36 9) 1/2)
|
|
5 |
Subtract 6 from 20 tripled. |
(- (* 20 3) 6)
|
(- 6 (* 3 20))
|
|
6 |
The product of 4 and the difference of 3 and 1. |
(* 4 (- 1 3))
|
(* 4 (- 3 1))
|
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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