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Positive and Negative Numbers by Monica Yuskaitis.

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Presentation on theme: "Positive and Negative Numbers by Monica Yuskaitis."— Presentation transcript:

1 Positive and Negative Numbers by Monica Yuskaitis

2 Definition Positive number – a greater than zero

3 Definition Negative number – a less than zero

4 Definition Opposite Numbers – numbers that are the same distance from zero in the opposite direction

5 Definition Integers – are all the whole numbers and all of their opposites on the negative number line including zero. 7 opposite -7

6 Negative Numbers Are Used to Measure Temperature

7 Negative Numbers Are Used to Measure Under Sea Level

8 Negative Numbers Are Used to Show Debt Lets say your parents bought a car but had to get a loan from the bank for $5,000. When counting all their money they add in -$5.000 to show they still owe the bank.

9 Positive & Negative Numbers Working with positive and negative numbers is like driving in traffic. You have to watch the traffic signs and follow the driving rules.

10 Hint If you dont see a negative or positive sign in front of a number it is positive. 9 +

11 Integer Addition Rules Rule #1 – If the signs are the same, pretend the signs arent there. Add the numbers and then put the sign of the addends in front of your answer = = -14

12 Solve the Problems = = (+3) + (+4) = = = =

13 Integer Addition Rules Rule #2 – If the signs are different pretend the signs arent there. Subtract the smaller from the larger one and put the sign of the larger one in front of your answer = = 4 Larger number Answer = - 4

14 Solve These Problems = = (+3) + (-4) = = = = -2 5 – 3 = – 9 = 0 9 – 5 = 4 7 – 6 = 1 4 – 3 = 1 7 – 4 = 3

15 One Way to Add Integers Is With a Number Line When the number is positive count to the right. When the number is negative count to the left. +-

16 One Way to Add Integers Is With a Number Line =-2

17 One Way to Add Integers Is With a Number Line =+2

18 One Way to Add Integers Is With a Number Line =-4

19 One Way to Add Integers Is With a Number Line =+4

20 One Way to Add Integers Is With a Number Line =+4

21 One Way to Add Integers Is With a Number Line =+6

22 One Way to Add Integers Is With a Number Line =-3

23 One Way to Add Integers Is With a Number Line =-6

24 One Way to Add Integers Is With a Number Line =-5

25 One Way to Add Integers Is With a Number Line =-5

26 One Way to Add Integers Is With a Number Line =-5

27 One Way to Add Integers Is With a Number Line =5

28 One Way to Add Integers Is With a Number Line =5

29 One Way to Add Integers Is With a Number Line =6


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