Study Notes
Integers are whole numbers that can be positive, negative, or zero. The sum of any integer and its opposite is zero.
- Integer — a whole number that can be positive, negative, or zero. Example: -3, 0, 4
- Adding a Positive — the same as addition. Example: 3 + (+2) = 5
- Subtracting a Negative — the same as addition. Example: 6 - (-3) = 9
- Adding a Negative — the same as subtraction. Example: 7 + (-2) = 5
- Subtracting a Positive — the same as subtraction. Example: 8 - (+2) = 6
Exam Tips
Key Definitions to Remember
- An integer is a whole number that can be positive, negative, or zero.
- The sum of any integer and its opposite is zero.
Common Confusions
- Confusing adding a negative with subtraction.
- Confusing subtracting a negative with addition.
Typical Exam Questions
- What is 5 + (−2)? Answer: 3
- What is 25 − (−4)? Answer: 29
- What is 6 − (+3)? Answer: 3
- What is 5 + (−7)? Answer: -2
What Examiners Usually Test
- Understanding of adding and subtracting positive and negative integers.
- Ability to use the number line to solve integer problems.