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Expressions Videos 14 videos
GED Math: Expression and Equations Drill 1, Problem 1. How much do the apples cost after tax?
GED Math: Expression and Equations Drill 3, Problem 5. Which part of the equation should be changed?
GED Math 5.3 Rational Numbers. What operation would make the following expression undefined?
CAHSEE Math 4.5 Number Sense 188 Views
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Description:
Number Sense: Drill Set 4, Problem 5. Solve the equation.
Transcript
- 00:03
And here's your shmoop du jour...
- 00:05
12/13 + 17/39 equals... what?
- 00:10
Here are the potential answers...
- 00:16
Short on words. Long on one very simple basic idea:
- 00:20
Did we realize that 13 evenly goes into 39 three times?
Full Transcript
- 00:26
If we did, then this is... E.Z.
- 00:29
Relative of Jay-Z.
- 00:32
All we have to do is multiply the top and bottom of the first fraction by 3...
- 00:36
...and we get 36 over 39...
- 00:39
...plus 17 over 39...
- 00:41
...which is 53 over 39.
- 00:43
We could simplify it further to get rid of the improper fraction...
- 00:47
...but the question doesn't ask for it.
- 00:48
Answer C is our guy.
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