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- 1. Positive and Negative Numbers by Monica Yuskaitis
- 2. Definition <ul><li>Positive number – a number greater than zero. </li></ul>0 1 2 3 4 5 6
- 3. Definition <ul><li>Negative number – a number less than zero. </li></ul>0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 4. Definition <ul><li>Opposite Numbers – numbers that are the same distance from zero in the opposite direction </li></ul>0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 5. Definition <ul><li>Integers – Integers are all the whole numbers and all of their opposites on the negative number line including zero. </li></ul>7 opposite -7
- 6. Negative Numbers Are Used to Measure Temperature
- 7. Negative Numbers Are Used to Measure Under Sea Level 0 10 20 30 -10 -20 -30 -40 -50
- 8. Negative Numbers Are Used to Show Debt Let’s 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 <ul><li>Working with positive and negative numbers is like driving in traffic. You have to watch the traffic signs and follow the driving rules. </li></ul>
- 10. Hint <ul><li>If you don’t see a negative or positive sign in front of a number it is positive. </li></ul>9 +
- 11. Integer Addition Rules <ul><li>Rule #1 – If the signs are the same, pretend the signs aren’t there. Add the numbers and then put the sign of the addends in front of your answer. </li></ul>9 + 5 = 14 -9 + -5 = -14
- 12. Solve the Problems <ul><li>-3 + -5 = </li></ul><ul><li>4 + 7 = </li></ul><ul><li>(+3) + (+4) = </li></ul><ul><li>-6 + -7 = </li></ul><ul><li>5 + 9 = </li></ul><ul><li>-9 + -9 = </li></ul>-8 -18 14 -13 7 11
- 13. Integer Addition Rules <ul><li>Rule #2 – If the signs are different pretend the signs aren’t there. Subtract the smaller from the larger one and put the sign of the larger one in front of your answer. </li></ul>-9 + +5 = 9 - 5 = 4 Larger number Answer = - 4
- 14. Solve These Problems <ul><li>3 + -5 = </li></ul><ul><li>-4 + 7 = </li></ul><ul><li>(+3) + (-4) = </li></ul><ul><li>-6 + 7 = </li></ul><ul><li>5 + -9 = </li></ul><ul><li>-9 + 9 = </li></ul>-2 5 – 3 = 2 0 -4 1 -1 3 9 – 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. + - 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 16. One Way to Add Integers Is With a Number Line + - +3 + -5 = -2 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 17. One Way to Add Integers Is With a Number Line + - +6 + -4 = +2 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 18. One Way to Add Integers Is With a Number Line + - +3 + -7 = -4 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 19. One Way to Add Integers Is With a Number Line - + -3 + +7 = +4 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 20. One Way to Add Integers Is With a Number Line - + -5 + +3 = +4 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 21. One Way to Add Integers Is With a Number Line - + -2 + +8 = +6 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 22. One Way to Add Integers Is With a Number Line - + -5 + +2 = -3 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 23. One Way to Add Integers Is With a Number Line - - -4 + -2 = -6 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 24. One Way to Add Integers Is With a Number Line - - -2 + -3 = -5 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 25. One Way to Add Integers Is With a Number Line - - -1 + -4 = -5 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 26. One Way to Add Integers Is With a Number Line - - -4 + -1 = -5 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 27. One Way to Add Integers Is With a Number Line + + 4 + 1 = 5 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 28. One Way to Add Integers Is With a Number Line + + 3 + 2 = 5 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6
- 29. One Way to Add Integers Is With a Number Line + + 1 + 5 = 6 0 1 2 3 4 5 6 -1 -2 -3 -4 -5 -6

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