Cougar Time. Adding Negative Numbers  What are the two rules for adding integers?  Same Signs = Add and keep the sign  Different Signs = Find the absolute.

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Presentation transcript:

Cougar Time

Adding Negative Numbers  What are the two rules for adding integers?  Same Signs = Add and keep the sign  Different Signs = Find the absolute value, subtract and keep the sign of the larger absolute value

Subtracting Negative Numbers  What is the rule for subtracting integers?  Same Change Flip  Same – Keep the first number the same  Change – Change subtraction to addition  Flip – Flip the sign of the second number

Practice   13 + (-8)  (-16) + (-8)     -12 – (-15)  34 – 78  23 – (-17)  4 – 16  -27 – 11  -29 – (-8)

Multiplication and Division  What are the rules multiplying and dividing negative number?  Same Signs = Positive  Different Signs = Negative

Practice  6 x (-8)  -5 x 20  -8 x (-8)  9 x (-11)  -14 x (-3)  32 ÷ -8  -120 ÷ -6  -88 ÷ -11  54 ÷ -6  -90 ÷ -15

Number Lines  Where on the number line are negative numbers?  LEFT of zero!  Where on the number line are positive numbers?  RIGHT of zero! (-) Negative 0 (+) Positive

Mixed Review  Draw a number line ranging from -25 to 25  Write down the rules for adding and subtracting integers.  Write down the rules for multiplying and dividing integers.