few_shots: 
Example:
Concept/skill: 
Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.
Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12, and 100.

Problem/activity:
Task
Cruz and Erica were both getting ready for soccer.
Cruz ran 1 lap around the school.
Erica ran 3 laps around the playground.
Erica said,
I ran more laps, so I ran farther.
Cruz said,
4 laps around the school is 1 mile, but it takes 12 laps around the playground to go 1 mile. My laps are much longer, so I ran farther.
Who is right? Draw a picture to help you explain your answer.


Answer: 
Yes. This task asks students to compare two fractions that are equal. The students need to explain why the two fractions are equal by drawing a picture, which involves using visual fraction models.

Now, assess whether the following problem or activity is 'aligned' with the given Common Core standard in Mathematics.

shot_info: im_task_000212_pos_0

4
standard_description: Understand that the zero and identity matrices play a role in matrix addition and multiplication similar to the role of 0 and 1 in the real numbers. The determinant of a square matrix is nonzero if and only if the matrix has a multiplicative inverse.
problem_activity: Task
2 bottles of water cost $5.00.
Fill in the table that shows the costs for 4, 6, and 8 bottles. Find the cost for a single bottle in each case.
{"table": [{"thead": [{"tr": [{"th": [{"_attributes": {"scope": "col"}, "_value": "Number of bottles"}, {"_attributes": {"scope": "col"}, "_value": "Cost (\\$)"}, {"_attributes": {"scope": "col"}, "_value": "Cost per bottle"}]}]}], "tbody": [{"tr": [{"td": [{"_value": "$$2$$"}, {"_value": "$$5$$"}, {}]}, {"td": [{"_value": "$$4$$"}, {}, {}]}, {"td": [{"_value": "$$6$$"}, {}, {}]}, {"td": [{"_value": "$$8$$"}, {}, {}]}]}]}]}
5 granola bars cost $4.00
Fill in the table that shows the costs for 10, 15, and 20 granola bars. Find the cost for a single granola bar in each case.
{"table": [{"thead": [{"tr": [{"th": [{"_attributes": {"scope": "col"}, "_value": "Number of granola bars"}, {"_attributes": {"scope": "col"}, "_value": "Cost (\\$)"}, {"_attributes": {"scope": "col"}, "_value": "Cost per bar"}]}]}], "tbody": [{"tr": [{"td": [{"_value": "$$5$$"}, {"_value": "$$4$$"}, {}]}, {"td": [{"_value": "$$10$$"}, {}, {}]}, {"td": [{"_value": "$$15$$"}, {}, {}]}, {"td": [{"_value": "$$20$$"}, {}, {}]}]}]}]}
Explain why if you can buy $a$ items for $b$ dollars, or buy $2a$ items for $2b$ dollars, the cost per item is the same in either case.


aligns: no