Posted on 03/10/2015 5:48:37 PM PDT by MNDude
My daughter has this problem-solving question for her homework. I'm feeling kind of dumb on this one. What do you think is the correct answer?
Mrs. Feltner wants to put a border on a baby blanket. The area of the blanket is 12 square units. Which shows how many units of materials she needs for the border?
A 12 units B 14 units C 15 units D 21 units
What about the corners?
That’s what my reasoning was. Now I’m confused again. :(
The problem as posted lacks sufficient data for a specific answer. Imagine a blanket that is 3 units by 4 units in size, for 12 square units. I would take 3+3+4+4 or 14 units to do a border. Now imagine a blanket 1 unit by 12 units, for 12 square units. It would take 1+1+12+12 or 26 units to do a boader.
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Or B. Not sure which.
Corners?
I don’t see the answer choice tt Tell Mrs. Feltner to buy a damn baby blanket.
14
The correct answer is:
Rainforests
If you’re putting a border on both sides, don’t forget to double the answer.
Depends whether the blanket is three units by four units, in which case the answer is fourteen units, or if it’s a long bed and the blanket is six units by two units, the answer is sixteen units - or if it’s a real long bed and the blanket is twelve units by one unit, the answer is twenty-six units, or if....I think you need a new math teacher.....
Stupid question because we do not know the measurement of the border. Is the border 1 unit and is it one or both sides.
Core Curriculum strikes again
In this case, it's the teacher who is confused (or careless), not you.
12 units sq^2 is 3x4. If the sides with four units have their sides covered, than it would be the two middle square units, on the sides that need covering.
4+4+1+1= 10 units needing covering. :)
What about the corners? They will be missing.
6 x 2 is a table topper :)
12 x 1 is a table runner :)
But every sewer knows you have to allow more than that for the miter....
That is why common formative assessments should be left to the professionals ;^}
You have to know the length and width to answer the question.
I guess the question is to confuse students about math, to force them to rely on authority for ‘context’ or ‘narrative’ in order to get an answer. It’s not really a math question.
if the AREA is 12sq ft then it must be a 3x4 ft blanket
3+4 times 2 = 14
(two 3 ft sides and two 4 ft sides)
The “only available correct answer” is B (14). There are other possible correct answers but they are not available. A child taking “old fashioned math” would probably easily figure it out; however, those of the “new math” and “common core” schools will be struggling and guessing forever.
you are correct!!!!
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