ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Order of Operations (PEMDAS) Videos 5 videos
Please Excuse My Dear Aunt Sally. What did she do? Slander the process of order of operations?
CAHSEE Math Algebra and Functions: Drill Set 1, Problem 4. Which operation should be performed first?
Algebra and Functions: Drill Set 3, Problem 2. Simplify the expression in this video.
CAHSEE Math 1.4 Algebra and Functions 295 Views
Share It!
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.
Related Videos
CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
It's impressive that these expressions are able to stay so rational even when they're having operations performed on them.
Jack and Jill went up the hill to fetch a pail of water. But what happened when they got up there? They’ve been gone an awfully long time…
