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Mathematical Reasoning Videos 30 videos
Mathematical Reasoning Drill 5, Problem 1. Which of the following could be the number of pieces the lasagna was cut into?
Mathematical Reasoning Drill 5 Problem 3. Which of the following could be the integer mentioned?
Mathematical Reasoning Drill 5, Problem 5. How many pencils could Mrs. Morrison have had?
CAHSEE Math 3.3 Mathematical Reasoning 245 Views
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Description:
Mathematical Reasoning Drill 3 Problem 3. When adding these fractions without finding the lowest common denominator, which of the following is the best estimate of the exact sum?
Transcript
- 00:03
Here's a shmoopy question you'll find on an exam somewhere in life.
- 00:07
When adding the fractions 3/7, 5/9 and 6/11 without finding the lowest common denominator,
- 00:14
which of the following is the best estimate of the exact sum?
- 00:18
And here are the potential answers...
- 00:23
Looks like this question is testin’ our estimatin’ skills.
Full Transcript
- 00:27
Basically, we just have to look at each of
- 00:29
the fractions and come up with a rough estimate for how close they are to 1/9, 1/3, ½ or 2/3.
- 00:37
3.5 sevenths would be a half, so 3 sevenths is slightly under.
- 00:42
4.5 ninths would be a half, so 5 ninths is slightly over.
- 00:49
Anyway. You get the idea.
- 00:51
The answer is a bunch of halves… or C.
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