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CAHSEE Math 1.4 Algebra and Functions 295 Views
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Description:
CAHSEE Math Algebra and Functions: Drill Set 1, Problem 4. Which operation should be performed first?
Transcript
- 00:03
And here's your shmoop du jour.
- 00:06
When simplifying the expression (16) + (-4) - (-4) × (-5) ÷ (-3),
- 00:14
which operation should be performed first?
- 00:18
Here are the potential answers...
- 00:19
...and hit pause. Try this thing yourself first.
Full Transcript
- 00:24
This is a pretty vanilla question testing whether we understand ordering.
- 00:28
In general, ordering goes like this:
- 00:31
Parentheses
- 00:32
Exponents
- 00:33
Then multiplication and division
- 00:34
Then addition and subtraction
- 00:37
And the process goes generally from left to right.
- 00:41
So since there are no parentheses or exponents here...
- 00:44
...we start with the multiplication and division.
- 00:47
The leftmost elements is the negative 4 times negative 5 -- that's the operation we do first.
- 00:52
So the answer is just C.
- 00:54
We have now proven ourselves as ordering masters.
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