Study Notes
Integers are whole numbers that can be positive, negative, or zero. They are used in various mathematical operations such as addition, subtraction, multiplication, and division.
- Integer — a whole number that can be positive, negative, or zero. Example: -3, 0, 7
- Opposite Integer — an integer that, when added to the original integer, results in zero. Example: The opposite of 9 is -9, because 9 + (-9) = 0
- Positive Integer — a whole number greater than zero. Example: 4, 5
- Negative Integer — a whole number less than zero. Example: -4, -5
- Zero — an integer that is neither positive nor negative. Example: 0
Exam Tips
Key Definitions to Remember
- An integer is a whole number that can be positive, negative, or zero.
- Opposite integers are two numbers whose sum is zero.
Common Confusions
- Confusing the rules for adding and subtracting integers.
- Misunderstanding the effect of multiplying or dividing two negative numbers.
Typical Exam Questions
- What is the sum of -3 and +2? Answer: -1
- How do you subtract a negative number from a positive number? Answer: Subtracting a negative is the same as adding a positive.
- What is the result of multiplying -4 by -5? Answer: 20
What Examiners Usually Test
- Understanding of integer operations on a number line.
- Ability to apply rules for adding, subtracting, multiplying, and dividing integers.
- Recognizing and using opposite integers.