Integers
Maths: Edexcel IGCSE Higher, topic 1.1.1
Integers
Integers are the set of all whole numbers.
Integers
- Integers can be positive, negative or zero.
- Integers are whole numbers.
Example
- −11,000, −34, −3, 0, 1, 57 and 100,000 are all integers.
- −34.1, −, 0.5, 1.1, and 57.76 are all non-integers.
Place Value
When a number is written out in digits, each number has a different value depending on what position it is in.
Hundreds
- The number 1 stands for 100 since it is in the hundreds place.
Tens of thousands
- The number 4 stands for 40,000 since it is in the tens of thousands place.
Hundreds of thousands
- The number 3 stands for 300,000 since it is in the hundreds of thousands place.
Negative Numbers
Negative numbers are shown with a minus sign in front (e.g. −4). Negative numbers are smaller than positive numbers.
Number line
- The number line above shows the first 3 negative and positive numbers.
- The positive numbers are all larger than the negative numbers.
- 0 is called the origin and is not negative or positive.
Multiplying negative numbers
- When multiplying a negative number by another negative number, the negatives cancel out and the result is positive.
Test yourself on Integers
Which of the following numbers is an integer?
Which of the following numbers is an integer?
Which of the following numbers is an integer?
Which of the following numbers is an integer?
Which of the following numbers is NOT an integer?