An integer is defined as a positive or negative whole number, including 0. The document outlines four basic operations involving integers: addition, subtraction, multiplication, and division, along with rules and examples for each operation. It emphasizes that when performing operations, if the signs are the same, the numbers are added and the result retains the same sign, while if the signs differ, the numbers are subtracted and the result takes the sign of the larger number.

1. INTEGERS
By: ALHEA ANNE MACABATA

2. What is an
Integer?

3. • An integer is a positive or
negative whole number,
including 0.
…-3, -2, -1, 0, 1, 2, 3…
Whole Number: Any number over 1.

4. There are
“4”
Integer
Operations

6. 4 Integer Operations
• Addition +
• Subtraction -
• Multiplication x
• Division ÷

7. Rules For Integers
• When Signs are the same, add the
numbers!
-5 - 1 = 5 + 1
• Answer gets the sign of the
larger number.
5 is the largest number
it’s sign is a (-).
Answer is -6.

8. Rules For Integers
• When Signs are the different
subtract the numbers.
-5 + 1 = 5 - 1
• Answer gets the sign of the
larger number.
5 is the largest number
it’s sign is a (-).
Answer is -4.

9. Let’s Practice
1) 5 - 6 =
2) -3 + 2 =
3) 6 + 5 =
4) -8 + 7 =
5) 9 - 9 =
Remember: If signs are the same add
the numbers, if signs are different
subtract the numbers. Then give the
answer the sign of the largest number!
-1
-1
+1
1
-1
0

10. Rules for Adding Integers
Follow these rules:
• If the integers have the same sign, add them
together and keep the sign.
For instance: 3 + 5 = 8 and -2 + (-5) = -7
• If the integers have different signs,
subtract them. The answer takes the sign of
the larger number.
For instance: 5 + (-8) = -3 and -4 + 11 = 7

11. Let’s Practice
1) 3 + (-5) =
2) -7 + 10 =
3) -3 + (-2) =
4) 8 + (-4) + 3 =
5) 2 + (-5) + (-3) =
-2
3
-5
7
-6

12. Rules for Subtracting Integers
Follow these rules:
• To subtract integers, ignore the signs and
subtract like you usually do. The answer
takes the sign of the larger integer.
For instance: 8 - 12, you would do 12 - 8
which is 4.
The 12 has a minus sign in front of it so the
answer is -4.

13. Let’s Practice Cont.
1) 2 - (-5) =
2) -24 – 9 =
3) -12 – (-18) =
4) 3 – (-6) - 8 =
5) 9 – (-1) - (-3) =
7
-33
6
1
13

14. WHAT'S YOUR
ORDER?

19. What is an integer?

20. ANSWER
• An integer is a positive or
negative whole number,
including 0.