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Integer is a
A. Fraction
B. Negative Number
C. Decimal or Percent
D. Postive Number
E. Both B and D
Interger is E, a Negative or Postive Whole Number
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When Adding, Subtracting, or multiplying an Integer, you always get an Integer as an answer
A. True
B. False
- A. True. When Adding, subtracting or multiplying an Integer, you ALWAYS get an integer as the answer.
- -3*11= -33
- -3 + 4= +1 or 1
- Remember an Integer is a Postive or Negative WHOLE number (not a fraction or percent, or decimal).
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When dividing an Integer, you always get an Integer as the answer.
A. True
B. False
- B. False. It is possible to get a fraction, or decimal when dividing with a integer.
- 8/5 (8 divided by 5) = 1.6
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Example Card:
When adding and subtracting with Negative Integers, imagine a line that moves left and right, with 0 as the center, negative numbers to the left of zero, positive numbers to the right of zero.
- ____________________0_______________________
- -10 -5 -4 -3 -2 -1 1 2 3 4 5 10 20
- Adding a postive number moves to the right
- -3 plus 4 equals positive 1
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Example Card
Adding a positive number to a negative integer moves the number to the right.
-3 plus 6 equals postive 3 (-3+6=3)
-10 plus 5 equals negative 5 (-10+5= -5)
- ____________________0______________________
- _-10 -5 -4 -3 -2 -1 1 2 3 4 5 10 20
-3 plus postive 6, move 6 sports to the right, to positive 3.
-10 plus positive 5, move 5 spots to the right, to negative 5.
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Example Card
Subtracting a postive number moves to the left.
4 minus 3 equals 1 (4-3=1)
-3 minus 5 equals negative 8 (-3 - 5= -8)
3 minus 5 equals negative 2
- __________________ 0________________
- -10 -9 -8-7-6-5-4-3-2-1 1 2 3 4 5 6 7 8 9 10
- 4 minus 3 (postive 4, move left 3 spaces, to postive 1)
- -3 minus 5 (negative 3, move 5 spaces left, to negative 8)
- 3 minus 5 (postive 3, moves 5 spaces left, to negative 2)
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Example Card
When adding a Negative number, move left:
Postive 4 plus Negative 3 equals postive 1.
4 + -3= 1
Negative 3 plus Negative 2 equals Negative 5.
-3 + -2= -5.
- ______________________0_______________________
- -10-9-8-7-6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10
- 4 + -3 (Postive 4, move left 3 spaces to postive 1)
- -3 + -2 (Negative 3, move left 2 spaces to Negative 5).
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Example Card
When subtracting a Negative Number, move right:
Positive 1 minus Negative 2 equals postive 3
1 - -2= 3 (subtracting a negative is like addition)
Negative 2 minus Negative 3 equals 1
-2 minus -3= 1
- ____________________0_____________________
- -10 -9 -8-7-6 -5 -4 -3-2-1 1 2 3 4 5 6 7 8 9 10
- 1- -2 (postive 1, move right 2 spaces, to postive 3)
-2 - -3 (negative 2, move right 2 spaces to postive 1)
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Multiply and Divide Integers:
Step 1: Ignore Signs and do the problem
Step 2: A. If original signs match, the result in postive
3*10=30, -5*-3=15, 24/8=3, -24/-8=3
B. If original signs don't match, the result is negative.
3*-10= -30, -5*-3= -15, -24/8=-3
Example Card in Front
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