Download 3-1 Integers and absolute values

Standard: Number Sense
N5 Integers
Objective: I will graph
integers on a number line
and evaluate absolute value
expressions
3-1 Integers and absolute values
p. 106-108
Integers(3-1): {…-3,-2,-1,0,1,2…} the
whole numbers and their opposites
Absolute value(3-1): The distance a
number is from zero | x |
Steps for graphing numbers on a number line
1.
Draw a line and make marks at evenly
spaced intervals
2.
Label the marks with a scale (go by 1 or 2
or 5 or .5, etc)
3.
Put a dot on the line where the selected
number belongs (magnify that spot)
Put the following on a number line
{-1, 5, -3, 2}
{-8, 0, 10}
Absolute Value
| - 4| means…
How far is -4 from zero?
4
So |-4|=4
Evaluate | 6 |←How far is 6 from 0?
| 6| = 6
Practice
Evaluate |-12| - | 5 |
Read : What is the difference between how far
-12 is from zero and how far 5 is from zero?
Answer:
|-12| - | 5 |
12 – 5
7
More examples to discuss…
1.
Describe a situation in life where
negative integers occur.
2.
On a number line graph 2 points that
have the same absolute value
3.
Which one doesn’t belong
| -3| -3
|3| 3
Homework

1, 3, & 8 periods- pg. 108 #17-33 odd

5 & 7 periods- pg. 108 #34-45