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