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Integers Videos 11 videos

Single Digit Addition with Carrying
210 Views

Hemingway was great with words, but not so great with numbers. Thankfully, he had his cats to help teach him math. Stick with us instead; we don't...

Introduction to Integers
14081 Views

Not just anyone can join the Integer Club. Watch this video to find out how you can make your way in.

SAT Math 2.4 Numbers and Operations
384 Views

SAT Math 2.4 Numbers and Operations

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SAT Math 4.1 Numbers and Operations 230 Views


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Description:

SAT Math 4.1 Numbers and Operations

Language:
English Language

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?

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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