IT COULD BE WORSE

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IT COULD BE WORSE
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Chapter 2 Integers

• Positive s numbers greater than zero
• Negative s numbers less than zero
• Integers are positive and negative numbers
  excluding fractions and decimals
• Zero is an integer, but its not or -

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Number Line

• Words to live by
• On a number line, you Increasing when you go to
  the right and decrease when you go to the left.
• If you add, then you go to the right.
• If you subtract, then you go to the left.
• In an add and subtract Problem when you find 2
  signs next to each other.
• Opposite Signs --
• Same Signs
• Note we wont add and subtract integers till
  2.2
• The opposite of a positive number is its negative
  counterpart
• The opposite of a negative number is its positive
  counterpart

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The difference Between Minus and Negative

• 3-2 Three minus 2
• -4 5 negative four plus five
• 7 (--9) seven minus negative nine
• -3 -12 negative three minus twelve
• 8 (-5) Eight plus negative five
• -(y) negative why
• Calculators have a minus button and a plus/minus
  button

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Absolute Values

• Calculator abs (x) (Same as anti-lock braking
  system)
• Try These
• Abs(5)
• Abs (-4)
• -abs(-7)
• Write these in order of smallest to biggest
• Abs(6), abs(-2), -(-1), -4, -abs(-8)

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Homework for 2.1

• 1 thru 127 EOO
• Problems 8, 14, 18, 30, 38, 46, 54, 66, 78, 94,
  108, 110, 118, 126

Ouch, my brain!
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2.2 Add Subtract

• Remember the Number Line!
• Ex
• 4-2
• 13
• 5-8
• 2-2
• -32
• -1-2
• 4(-5)
• (-4)(-6)(-8)9

Notes to remember Opposite signs - Same Signs

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You better try these!

• 47(-53)
• -6
• Find the sum of -154 and -37
• -191
• Evaluate xy when x-3 and y -10
• -7
• What is 14 less than -8
• -22
• What is 25 decreased by 68
• -43
• -4-(-3)12-(-7)-20
• -2

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Apply this!

• Find the temperature after an increase of 10 deg.
  Celsius from -3 deg. Celsius.
• 7 degrees Celsius
• The average temperature on the earths surface is
  57 degrees Fahrenheit. The average temp
  throughout Earths stratosphere is -70 deg. F.
  Find the difference between these temperatures.
• 127 deg. F
• The distance, d, between point a and point b on a
  number line is given by the formula dabs(a-b)
  where abs means absolute value of. Find d when a
  -6 and b5.
• d 11

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2.2 Homework

• 1 thru 143 EOO
• 36, 52, 96, 98, 114, 132, 140, 146