Review
(+2) x (+3)= 6
- zero pair -a positive # and a negative # combined make a zero pair.
(Eg. 1-1=0)
- number lines can be used.
- "When subtracting something th
at isn't there, use a zero pair." This saying helps when subtracting integers."
- Gr. 7 way:
(+7) + (-3) =
positive 7 and negative 3.
have 7 and owe 3.
+7 + -3
Gr. 8 way:
positive 7 and negative 3.
have 7 and owe 3.
+7 + -3
Gr. 8 way:
7 - 3 = 4
-Stared Homework Questions:
-3 - (-7) = 4
-3 - 7 = -10
3 - 7 = -4
3 + 7 = 10
-3 + 7 = 4
Chapter 2: Multiplying Integers
- Sign Rule (negative signs)
Whenever you have an odd number of negative factors the product will be a NEGATIVE number, and when you have an even number of negative factors the product will be a POSITIVE number.
(+2) x (-3)= -6
(-2) x (+3)= -6
(-2) x (-3)= 6
Chapter 3: Dividing Integers
Partitive Division: means how many groups there are and how many integers are in that group
6÷ 2=3
means in partitive division-
How many groups of +2 are in 6?
-6 ÷ (-2)= 3
means in partitive division-
How many groups of +2 are in 6?
-6 ÷ (-2)= 3
means in partitive division-
How many groups of -2 are in -6?
Quotative Division: means sharing equally so that every group has the same amount of integers
(-6) ÷ 2 = -3
Share (-6) with 2 groups.
Multiplicative Division
-6 ÷ -2 = 3
-3 x -2 = 6
-2 x -3 = 6
-6 ÷ 2 = -3
2 x -3 = -6
-3 x 2 = -6
Quotative Division: means sharing equally so that every group has the same amount of integers
(-6) ÷ 2 = -3
Share (-6) with 2 groups.
Multiplicative Division
-6 ÷ -2 = 3
-3 x -2 = 6
-2 x -3 = 6
-6 ÷ 2 = -3
2 x -3 = -6
-3 x 2 = -6
(+5) x (-3) + (-6) ÷ (+3)=
[(+5) x (-3)] + [(-6) ÷ (+3)]=
(-15) + (-18) = +33
Chapter 4: Order Of Operations With Integers
BEDMAS: Brackets, Exponents, Division, Multiplication, Addition, Subtraction
(+10) x (-5) + (+6) ÷ (+3)
1. add square brackets
[(+5) x (-3)] + [(-6) ÷ (+3)]=
(-15) + (-18) = +33
Chapter 4: Order Of Operations With Integers
BEDMAS: Brackets, Exponents, Division, Multiplication, Addition, Subtraction
(+10) x (-5) + (+6) ÷ (+3)
1. add square brackets
[(+10) x (-5)] + [(+6) - (+3)]
2. answer what's in the square brackets
[(+10) x (-5)] + (+6) - (+3)
-50 +
3. After the brackets you find the exponents
3. After the brackets you find the exponents
4. Then after exponents do the multiplication and division (answer left - right)
[(+10) x (-5)] + (+6) - (+3)
-50 +
-50 + 2
5. After the multiplication/ division then you do add and subtract (answer left - right)
6. Then you have your answer.
[(+10) x (-5)] + (+6) - (+3)
-50 +
-50 + 2
= -48
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