Learning objectives
Understand numbers, place value and how numbers are represented.
By the end of this course, you should be able to explain the key ideas, use the methods and answer practice questions.
Lesson notes
Whole numbers and place value
A digit's value depends on its position. In 4,582, the 4 represents 4 thousands, the 5 represents 5 hundreds, the 8 represents 8 tens and the 2 represents 2 ones.
Integers
Integers are whole numbers, their negatives and zero: … −3, −2, −1, 0, 1, 2, 3 …
Comparing and ordering
Use > to mean greater than and < to mean less than. For example, 17 > 9 and −2 < 1.
Roman numerals
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000.
Worked example
In 5,307, the digit 3 is in the hundreds position, so its value is 300.
Practice quiz
Enter an answer for each question. Then select Check answers. For fractions, use forms such as 1/2.