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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 .
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