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SAT Math 1.1 Algebra and Functions. Find an algebraic equation to correspond with the data.
SAT Math 1.1 Geometry and Measurement. What is the circumference of the circle?
SAT Math 1.1 Numbers and Operations. How many combinations of beverage and cereal can be made?
SAT Math 4.1 Numbers and Operations 230 Views
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Description:
SAT Math 4.1 Numbers and Operations
Transcript
- 00:02
Put this in your calculator and shmoop it...
- 00:05
When an integer is multiplied by itself four times, the result can be...
- 00:08
I. Positive II. Negative III. Equal to zero
- 00:11
And here are the potential answers...
- 00:16
So what is this question asking?
Full Transcript
- 00:18
In short... it's testing our number sense.
- 00:26
Let's start with a positive number.
- 00:28
The easiest number to choose is 1.
- 00:30
Multiply 1 by itself 4 times... and we get 1.
- 00:33
Now let's try a negative number.
- 00:35
We're going to be insanely creative and pick... negative 1.
- 00:38
Multiply it by itself 4 times and we get...
- 00:42
-1 times -1... that's positive 1. Times -1 is negative 1. Times -1 again is positive 1.
- 00:52
Now we know that both the positive and negative cases will give us a positive answer.
- 00:57
We've only got one number left to try. Multiply by 0.
- 01:01
0 by 0 by 0 by 0... it's just 0
- 01:04
Never going to be anything different.
- 01:06
When we tested these three cases, we saw that
- 01:08
the only possible outcomes were a positive number or 0.
- 01:12
The answer is B. As in, "Boo."
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