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# Integers

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### Transcript of "Integers"

1. 1. Learning Objective: SWBAT subtract integers using the additive inverse.
2. 2. Use the flow chart to subtract 4 – (-6)
3. 3. Learning Objective: SWBAT subtract integers using the additive inverse. <ul><li>Key Concept: Subtracting Integers. </li></ul><ul><li>TO SUBTRACT INTEGERS, ADD ITS OPPOSITE OR ADDITIVE INVERSE a.k.a Keep Change Change </li></ul><ul><li>Example: </li></ul><ul><li>4 – 7 = 4 + (-7) “ To subtract 7, add -7” </li></ul><ul><li>9 – 12 = </li></ul><ul><li>-6 – 8 = </li></ul><ul><li>7 – (-15) = 7 + (+15) “ To subtract -15, add 15” </li></ul><ul><li>-30 – (-20) = </li></ul>
4. 4. Learning Objective: SWBAT subtract integers using the additive inverse. <ul><li>Your Turn: Show that your adding the additive inverse </li></ul><ul><li>3 – 7 = </li></ul><ul><li>-6 – (-9) = </li></ul><ul><li>11 – (-8) = </li></ul><ul><li>-6 – 2 = </li></ul><ul><li>15 – (-3) = </li></ul><ul><li>-7 – (-11) = </li></ul>
5. 5. Learning Objective: SWBAT subtract integers using the additive inverse. <ul><li>Evaluate Algebraic Expressions: </li></ul><ul><li>Use the rules for subtracting integers to evaluate </li></ul><ul><li>Evaluate each expression if a = 9, b = -8, and c= -2. </li></ul><ul><li>14 – b </li></ul><ul><li>14 - b = 14 - (-8) (common error is to replace b with 8 instead of -8 to prevent this error use parentheses before replacing the variable with its value.) </li></ul><ul><li>c – a -3 – b </li></ul><ul><li>c – (-8) a – b - 3 </li></ul>
6. 6. Learning Objective: SWBAT subtract integers using the additive inverse. <ul><li>Guided practice: Page 30 #’s 30 – 41 </li></ul><ul><li>Journal Prompt: Page 30 # 2 </li></ul>
7. 7. Learning Objective: SWBAT multiply and divide integers. <ul><li>Review Vocabulary: </li></ul><ul><li>FACTOR: Numbers that are multiplied together. </li></ul><ul><li>PRODUCT: the result when two or more numbers are multiplied together. </li></ul><ul><li>DIVIDEND : is the number you are dividing. (Ex 12 ÷3=4) 12 is the dividend </li></ul><ul><li>DIVISOR: is the number you are dividing by. (Ex 12÷ 3 =4) 3 is the divisor </li></ul><ul><li>QUOTIENT : is the result in a division problem (Ex. 12÷3= 4 ) 4 is the quotient </li></ul>
8. 8. Learning Objective: SWBAT multiply and divide integers. <ul><li>Key concept: </li></ul><ul><li>Multiplying integers: </li></ul><ul><li>The factors have the SAME signs. The product is POSITIVE </li></ul><ul><li>The factors have DIFFERENT signs. The product is NEAGTIVE. </li></ul><ul><li>Dividing Integers: </li></ul><ul><li>The dividend and the divisor have the SAME signs. The quotient is POSITIVE. </li></ul><ul><li>The dividend and the divisor have DIFFERENT signs. The quotient is NEGATIVE . </li></ul>
9. 9. Now lets have some fun! <ul><li>Click on the website below to start the game: </li></ul><ul><li>http://www.math-play.com/integers-game.html </li></ul>
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