Math 7

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# Math 7 - PowerPoint PPT Presentation

THE WONDERFUL WORLD OF INTEGERS. Math 7. WHAT IS AN INTEGER?. Integers - the set of whole numbers and their opposites (…,-3,-2,-1,0,1,2,3,…)

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## PowerPoint Slideshow about ' Math 7' - macy

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Presentation Transcript
THE WONDERFUL WORLD OF INTEGERS

### Math 7

WHAT IS AN INTEGER?

Integers- the set of whole numbers and their opposites (…,-3,-2,-1,0,1,2,3,…)

Opposites- the opposite of a number is found by going the same distance from zero on a number line, but in the opposite direction

- basically, you just have to change the sign to its opposite

WHAT IS AN INTEGER?

Find the opposite of the following:

9___ -11___ -56___ 32 ___

Since the whole numbers are 0,1,2,3,… and the integers are described as the whole numbers and their opposites, then the integers are: …,-3,-2,-1,0,1,2,3,…

ARE THESE INTEGERS? YES OR NO?

Integers or Not:

-23 ___

99 ___

-43___

22.5 ___

-12.9___

ABSOLUTE VALUE
• Absolute Value- the absolute value of a number is the number’s distance from zero on a number line

- symbol

When you see this, it is asking for the absolute value of the number inside…12 in this case

In other words…how many units away from zero is 12 on a number line?

ABSOLUTE VALUE

Since the absolute value is asking you about distance, will it ever be negative? Can you have a negative distance?

Find the following:

DON’T GET ‘EM CONFUSED!
• Absolute Value and Opposites are often confused
• Remember….for Opposites, you change it to the opposite sign. For Absolute Value, you just make the number positive
• Try to keep them straight!