Uploaded by John Carrasco-Ahuacatitan

6.NS.3 Task Problems Answer Key

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Scoring Instructions:
1.
Matthew ran 3.1 miles at an average pace of 9.2 minutes per mile.
How many minutes did it take Matthew to run 3.1 miles, rounded to
the nearest hundredth?
If Matthew’s goal is to run 3.1 miles in 25.5 minutes, what should his
average pace be? Round your answer to the nearest hundredth.
Use words, numbers, and/or pictures to show your work.
Scoring Instructions:
Work demonstrates a clear and complete understanding of the
mathematical concepts and/or procedures required by the task.
2 Appropriate strategy is shown with clear and complete explanations
and interpretations.
Response demonstrates a partial understanding of the mathematical
concepts and/or procedures. Appropriate strategy is shown, but
explanation or interpretation has minor flaws.
1 OR
Response is incorrect because of calculation errors. Work and strategy
indicate a clear understanding of the mathematical concepts and/or
procedures required by the task.
0 Response is irrelevant, inappropriate, or not provided.
SCORING EXEMPLAR
Maximum Points—2
Part A—[1 point]
minutes
or equivalent work
Part B—[1 point]
minutes per mile
or equivalent work
2.
The prices of packages of miniature cars at different stores are shown in
the table. The miniature cars must be purchased in whole packages.
6.NS.3 Task Problems
Page 1 of 4
Part A In the table above, type the unit price for each miniature car at
each store.
Part B Mr. Ming plans to buy 60 miniature cars. How much money would
he save buying them at the cheapest unit price compared to the next
cheapest unit price?
Part C The most expensive unit price was decreased by $0.10 per car.
Using this new price, how many miniature cars could be purchased for
$20?
Scoring Instructions:
Rubric
Score
4
Description
Student earns 5 value points.
Part A 3 value points
Store A:
Store B:
Store C:
1 point for each correct unit price
Store A: $0.89
Store B: $0.92
Store C: $0.94
Part B 1 value point
= 15 packages
15 × 3.56 = 53.40
6.NS.3 Task Problems
Page 2 of 4
= 12 packages
12 × 4.60 =55.20
55.20 – 53.40
1 point for a correct answer
$1.80
Part C 1 value point
0.94 – 0.10 = 0.84
0.84 × 6 =5.04
3 packages
3 packages × 6 car per packages
1 point for a correct answer
18
3.
3
Student earns 3 or 4 value points.
2
Student earns 2 value points.
1
Student earns 1 value point.
0
The response is incorrect or irrelevant.
The table below shows the rainfall in Florida over several months.
Part A. Which two consecutive months have a combined total rainfall
greater than 5.75 inches? Use words, numbers, and/or pictures to explain
your reasoning.
Part B. Over the 5 months given, what percentage of the rain fell in
February? Use words, numbers, and/or pictures to explain your reasoning.
Round your answer to the nearest whole percent.
Scoring Instructions:
Scoring
6.NS.3 Task Problems
Page 3 of 4
Rubric
2
Work demonstrates a clear and complete understanding of the
mathematical concepts and/or procedures required by the task.
Appropriate strategy is shown with clear and complete
explanations and interpretations.
Response demonstrates a partial understanding of the
mathematical concepts and/or procedures. Appropriate strategy
is shown, but explanation or interpretation has minor flaws.
1
OR
Response is incorrect because of calculation errors. Work and
strategy indicate a clear understanding of the mathematical
concepts and/or procedures required by the task.
0
Response is irrelevant, inappropriate, or not provided.
SCORING
EXEMPLAR
Maximum Points—2
Part A—1 point
The consecutive months would have to be April and May.
The total for all the other consecutive months is less
than 5.75. January and February is 5.63, February and
March is 3.35, and March and April is 4.56.
or equivalent work
Part B—1 point
15%
or equivalent work
6.NS.3 Task Problems
Page 4 of 4
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