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# Integers

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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.
• 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