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# 01-04 & 05 Integers +, -, x, /

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• 06/04/09 alg02_11 Bitsy Griffin
• ### 01-04 & 05 Integers +, -, x, /

1. 1. Integers +, -, x, / Basics 06/04/09 PH 01-4 & 5 Bitsy Griffin
2. 2. Integers <ul><li>Whole numbers and their opposites. </li></ul><ul><li>Other vocabulary: </li></ul><ul><li>Opposites </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
3. 3. Absolute Value <ul><li>Distance a # is from 0. </li></ul><ul><li>Always positive. </li></ul><ul><li>Read as: </li></ul><ul><li>The absolute value of . . . </li></ul><ul><li>|-6| </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
4. 4. Adding #’s w/same sign: <ul><li>Add absolute values and tack on the sign. </li></ul><ul><li>Adding #’s w/ op signs: </li></ul><ul><li>Find difference of absolute values </li></ul><ul><li>Take sign of number that “appears” larger </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
5. 5. subtracting #’s <ul><li>Add the opposite of the second # </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
6. 6. AV on Calculator <ul><li>2 nd 0 takes you to the catalogue. </li></ul><ul><li>abs is absolute value. </li></ul><ul><li>Hit enter. </li></ul><ul><li>Make sure you close the (). </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
7. 7. Multiply Positive Integers <ul><li>Multiply or Divide any number of terms </li></ul><ul><li>Answer is always positive </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
8. 8. X or / Mixed or Negative Integers <ul><li>Multiply or divide an even number of negative integers </li></ul><ul><li>Answer is always positive </li></ul><ul><ul><li>Multiply or divide an odd number of negative integers </li></ul></ul><ul><ul><li>Answer is always negative </li></ul></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
9. 9. Caution <ul><li>Watch out for negative integers raised to powers </li></ul><ul><li>-3^2 </li></ul><ul><li>(-3)^2 </li></ul><ul><li>-3^3 </li></ul><ul><li>(-3)^3 </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
10. 10. Review <ul><li>How do you add Integers with same sign? </li></ul><ul><li>How do you add Integers with diff signs? </li></ul><ul><li>How do you subtract integers? </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin
11. 11. Review <ul><li>In multiplication / division, how do you know the answer should be positive? </li></ul><ul><li>Negative? </li></ul>06/04/09 PH 01 4 & 5 Bitsy Griffin