Grade 4 math nevada 09 answers

Page 22Copyrght © 2009 by the Nevada Department of Educaton 3 Student scores 3 points.. Description of Score Points: Part A: score 1.5 points correct answer correct total for all 3 toys

7 B C1 2 32 A C5 2

9 C C1 1 34 B C2 1

11 A C1 2 36 C C2 1

13 B C1 1 38 * C3 3

15 * C5 3 40 A C1 1

17 C C4 1 42 D C5 2

19 D C1 1 44 D C1 2

21 C C5 1 46 A C1 1

23 B C2 1 48 B C3 2

25 D C1 2 50 B C2 2

Page 22

Copyrght © 2009 by the Nevada Department of Educaton

3 Student scores 3 points

2 Student scores 2–2.5 points

1 Student scores 0.5–1.5 points

0 Student’s response provides insufficient evidence of appropriate skills or

knowledge to successfully accomplish the task

Blank No student response

Description of Score Points:

Part A: score 1.5 points correct answer (correct total for all 3 toys) with correct and

complete work

OR

score 1.0 point correct answer with incomplete work

OR

correctly finds number of 2 types of toys remaining with complete work

OR

incorrect answer due to a calculation error (work must

be shown)

OR

score 0.5 point correct answer with no work

OR

some correct procedure

OR

vague explanation only

Part B: score 1.5 points correct answer with correct and complete explanation

(or correctly follows based on answer to Part A)

OR

score 1.0 point correct answer with incomplete explanation

OR

score 0.5 point correct answer with no explanation

OR

vague explanation only

more people bought games and there are plenty of games remaining in the store Therefore, I predict a game will be sold to the next customer

Page 24

Copyrght © 2009 by the Nevada Department of Educaton

3 Student scores 3 points

2 Student scores 2–2.5 points

1 Student scores 0.5–1.5 points

0 Student’s response provides insufficient evidence of appropriate skills or

knowledge to successfully accomplish the task

Blank No student response

Description of Score Points:

Part A: score 1.5 points correct answer with correct and complete work or

explanation

OR

score 1.0 point correct answer with incomplete work or explanation

OR

incorrect answer due to a calculation error (work must

be shown)

OR

score 0.5 point correct answer with no work or explanation

OR

some correct procedure

OR

vague explanation only

Part B: score 1.5 points correct answer with correct and complete work or

explanation (or correctly follows from answer in Part A)

OR

score 1.0 point correct answer with incomplete work or explanation

OR

incorrect answer due to a calculation error (work must

be shown)

OR

score 0.5 point correct answer with no work or explanation

OR

some correct procedure

OR

vague explanation only

OR Sample explanation:

Looking at the picture, it looks like the basketballs are stacked about 3 high and 4 wide and 3 deep So, I multiplied 3 by 4 by 3 to come up with my estimate of about 36 basketballs

Part B: Answers will vary 50–100

Sample answer: 80 (students)

(or equivalent work)

OR Sample explanation:

To predict the number of groups, I used my answer

of 36 basketballs from Part A I divided 36 by 2

basketballs per group to get 18 groups I then rounded

18 to 20 Since there are 3–5 players in each group,

I multiplied 20 by 4 to get 80 for my estimate of the number of students

Page 26

Copyrght © 2009 by the Nevada Department of Educaton

3 Student scores 3 points

2 Student scores 2–2.5 points

1 Student scores 0.5–1.5 points

0 Student’s response provides insufficient evidence of appropriate skills or

knowledge to successfully accomplish the task

Blank No student response

Description of Score Points:

Part A: score 1.5 points correct answer (completes table with 2 correct start times

and 1 correct end time) with correct and complete work or explanation

OR

score 1.0 point correct answer with incomplete or no work or explanation

OR

creates table with 2 correct times with correct work or explanation

OR

incorrect answer due to a calculation error (work must

be shown)

OR

score 0.5 point some correct procedure

OR

vague explanation only

Part B: score 1.5 points correct and complete explanation

OR

score 1.0 point partially correct or incomplete explanation

OR

score 0.5 point vague explanation only

Note: Students should not lose points for copy errors

6:45–60 minutes = 5:45 (start time to bake and

5:45–30 minutes = 5:15 (start time to prepare) (or equivalent work)

OR Sample explanation:

I worked back from the end time to bake I counted back 60 minutes from 6:45 to get 5:45 for the start time to bake This is also the end time to prepare Then, I counted back 30 more minutes from 5:45 to get 5:15 for the start time to prepare

Part B: Accept all correct and complete explanations A correct and complete

explanation must meet all the criteria listed in Part B of the question

Sample explanation:

Mike has time while his pie is baking to prepare the cookies The pie bakes for 60 minutes from 5:45

to 6:45 He only needs 45 minutes to prepare the cookies, so he can prepare the cookies from 6:00 to 6:45 Then, he can bake the cookies from 6:45 to 7:00 while the pie is cooling