The document discusses multiplying integers. It defines integers as whole numbers that can be positive or negative. It then explains that when multiplying integers, if the signs are the same, the answer is positive, but if the signs are different, the answer is negative. Examples of multiplying different combinations of positive and negative integers are provided.

1. Multiplying Integers
3 x 2 = 6
-3 x 2 = -6

2. What is an integer?
Integers are just whole numbers
Integers can be negative
• A number less than zero
• Express ideas of down, a loss or a
debt
• The sign for a negative integer is
(-), however this sign is always
needed
• Numbers like -3 or -5
Integers can be positive
• A number greater than zero
• Express ideas of up, a gain or a
profit
• The sign for a positive integer is
(+), however the sign is not
always needed
• Meaning +3 is the same value as 3
• Numbers like 5 or 6
MULTIPLY
INTEGERS

3. How do we multiply positive
and negative integers?
MULTIPLY
INTEGERS
If the signs are the same, the answer is positive.
If the Beginning
Signs Are . . .
Then the Calculation
we do is . . . .
The End Sign of our
answer is . . . . Example
SAME Multiply POSITIVE 3 x 1 = 3

4. How do we multiply positive
and negative integers?
MULTIPLY
INTEGERS
If the signs are the same, the answer is positive.
If the Beginning
Signs Are . . .
Then the Calculation
we do is . . . .
The End Sign of our
answer is . . . . Example
SAME Multiply POSITIVE 3 x 1 = 3
If the Beginning
Signs Are . . .
Then the Calculation
we do is . . . .
The End Sign of our
answer is . . . . Example
SAME Multiply POSITIVE 3 x 1 = 3

5. How do we multiply positive
and negative integers?
MULTIPLY
INTEGERS
If the signs are the Different, the answer is negative.
If the Beginning
Signs Are . . .
Then the Calculation
we do is . . . .
The End Sign of our
answer is . . . . Example
DIFFERENT Multiply Negative 3 x 1 = 3

6. How do we multiply positive
and negative integers?
MULTIPLY
INTEGERS
If the signs are the Different, the answer is negative.
If the Beginning
Signs Are . . .
Then the Calculation
we do is . . . .
The End Sign of our
answer is . . . . Example
DIFFERENT Multiply Negative 3 x 1 = 3
If the Beginning
Signs Are . . .
Then the Calculation
we do is . . . .
The End Sign of our
answer is . . . . Example
DIFFERENT Multiply Negative 3 x 1 = 3

7. 7 x 8
1. We are multiplying and the numbers
have same sign.
2. Multiply
7 x 8 =
ANSWER:
56
MULTIPLY
INTEGERS

8. 9 6
1. We are multiplying and the numbers
have same sign.
2. Multiply
9 x 6 =
ANSWER:
54
MULTIPLY
INTEGERS

9. (12)(4)
1. We are multiplying and the numbers
have same sign.
2. Multiply
12 x 4 =
ANSWER:
48
MULTIPLY
INTEGERS

10. -2 x 9
1. We are multiplying and the numbers
have different sign.
2. Multiply
-2 x 9 =
ANSWER:
-18
MULTIPLY
INTEGERS

11. 7 -7
1. We are multiplying and the numbers
have different sign.
2. Multiply
7 x -7 =
ANSWER:
-49
MULTIPLY
INTEGERS

12. (5) x (-10)
1. We are multiplying and the numbers
have different sign.
2. Multiply
5 x -10 =
ANSWER:
-50
MULTIPLY
INTEGERS

13. SUMMARY
MULTIPLY
INTEGERS
If the signs are the same, the answer is positive.
If the signs are the Different, the answer is negative.