Today, February 7th, in PreCal 20S, we learned about real number lines.
Every real number corresponds to a point on the real number line. There is a one-one correspondence between real numbers and the points on the line. In this real number line, there are no gaps, the line is complete throughout. Example:
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-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
When Graphing on a Real Number Line - An open dot means that the point does not include the real number. A closed dot means that the point includes the real number.
Absolute Value
Also, today in class, we learned about absolute value.
The absolute value of a real number is the distance from zero to the position of the number on the real number line. When finding the absolute value of a real number, ignore the signs.
The notation for absolute value is x
Example: -2 = 2 , 2 = 2
Example: 2 - -5 , 2 - 5 = -3
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4 comments:
Good post Jamie! Mrs. Remple
I feel i almost fully understand the concept of real numbers and absolute numbers. I think you did a crappy job of putting notes on blogger though, just kidding. Great Job
Great job Jamie! Bravo!!!!!!!
You didn't use the absolute value signs when you made your post. Its the button on top of the enter button. |-2| = 2.
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