Standard: Number Sense N5? Integers

1
Standard Number Sense N5? Integers

• Objective I will graph integers on a number
  line and evaluate absolute value expressions

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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

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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)

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Put the following on a number line

• -1, 5, -3, 2
• -8, 0, 10

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Absolute Value

• - 4 means
• How far is -4 from zero?
• 4
• So -44
• Evaluate 6 ?How far is 6 from 0?
• 6 6

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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
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More examples to discuss

• Describe a situation in life where negative
  integers occur.
• On a number line graph 2 points that have the
  same absolute value
• Which one doesnt belong
• -3 -3 3 3

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Homework

• 1, 3, 8 periods- pg. 108 17-33 odd
• 5 7 periods- pg. 108 34-45