Integer Operations Rules
Presentation
•
Mathematics
•
6th - 8th Grade
•
Hard
Joseph Anderson
FREE Resource
9 Slides • 15 Questions
1
integer division
2
Remember rules for
integer multiplication?
Positive x positive = Positive (+)
Negative x negative = Positive (+)
Positive x negative = Negative (-)
Negative x positive = Negative (-)
3
Division is simply "undoing" multiplication
So...
8/2 ( 8 divided by 2)
could also be 2 x ? = 8
4
That means we have to use the rules for multiplying integers
5
Let's look at 8/2 again
If we use 2 x ? = 8, our rules tell us the answer HAS to be a POSITIVE number
(Positive x positive = Positive)
6
Let's look at the same numbers, but let's make the 8 negative this time
-8/2
This time 2 x ? = -8, so our rules tell us the answer HAS to be a NEGATIVE number
(Positive x negative = Negative)
7
Let's look at the same numbers, but now make the 2 negative this time
8/-2
This time -2 x ? = 8, so our rules tell us the answer HAS to be a NEGATIVE number
(Negative x negative = Positive)
8
Finally, let's make both numbers negative
-8/-2
This time -2 x ? = -8, so our rules tell us the answer HAS to be a POSITIVE number
(Negative x positive = Negative)
9
Let's look at a few examples!
10
Multiple Choice
-10/-2
(-10 divided by -2)
OR -2 x ? = -10?
Remember your rules for integer multiplication!
5
-5
8
-12
11
Multiple Choice
-10/2
(-10 divided by 2)
OR 2 x ? = -10?
Remember your rules for integer multiplication!
5
-5
8
-12
12
Multiple Choice
10/-2
(10 divided by -2)
OR -2 x ? = 10?
Remember your rules for integer multiplication!
5
-5
8
-12
13
Multiple Choice
-24 / -4
(-24 divided by -4)
OR -4 x ? = -24
Remember your rules for integer multiplication!
6
-6
14
Multiple Choice
20 / -4
(20 divided by -4)
OR -4 x ? = 20
Remember your rules for integer multiplication!
5
-5
15
Multiple Choice
When multiplying two positive numbers together the answer will be _______________________.
Negative
Positive
16
Multiple Choice
Is the product
–8 • (–3) positive or negative?
negative
positive
both
neither
17
Multiple Choice
-35 ÷ ___ = -7
5
-5
7
-7
18
Multiple Choice
(-1)(-1)(-1)(-1)(-1)(-1)(-1)
-1
1
-7
7
19
Multiple Choice
20
Multiple Choice
21
Multiple Choice
If I have two negatives what will the product be?
Negative
Positive
22
Multiple Choice
If I have a negative multiplied with a positive, what will the answer be?
Positive
Negative
23
Multiple Choice
If I have a positive multiplied with a positive, what will the answer be?
Positive
Negative
24
Multiple Choice
(-25) ÷ (-5)
5
-5
-20
-30
integer division
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