WARMUPS

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WARMUPS

• - 3 5 _____
• 9 - ( - 8 ) _____
• - 3 - 2 6 _____
• DRAW A PIG

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HOMEWORK

• PAGE 20-22 DO 1-61 ODD DO 68 71 ALL.
• IF YOU CAN DO THESE YOU ARE A SUPER MATHEMATICIAN

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Adding Integers
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The Rules for adding integers are as follows 1.
If the numbers have the same signs, add them and
keep that sign. 2. If they have opposite signs,
subtract and take the sign of the larger number.
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Adding Integers
Half the addition problems are easy!
If both numbers are positive, just add them like
you did in first grade!
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If both numbers are negative, add them the same
way. Just remember that the sum will be
__________also!
negative
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The other half of the problems are a little
trickier!
If one of the numbers is positive and the other
is negative.
Remember, if a number has no sign, it is
positive.
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So if you are adding...
First, think of the numbers 9 and 5
Second, calculate the _________ between 9 and 5.
difference
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Give the sum the same sign as the LARGER absolute
value.
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Sample Problems
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It is -1oC
4 3 2 1 0 -1 -2 -3

• The temperature rises by 2 degrees

• What temperature is it now?

1oC
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-1510
-5
13
-1520
5
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Adding a positive and a negative number is like
having two plays in football. One where you gain
yardage and one where you lose yardage. The
answer is the amount of change from the two plays
combined.
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The Jacksonville Jaguars lose 4 yards on the
first play and gain 6 yards on their second play.
What is the net gain?
2 yards!!
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Adding Integers
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HOMEWORK

• INTEGER HANDOUT.
• IF YOU CAN DO THESE YOU ARE A SUPER MATHEMATICIAN