In this module, you can study the concept of place value and have an introduction to the decimal number system. Also included on this page are the concepts of expanded form and word form of decimal numbers.
The video above explains the basic concept of place value. The example is based on South African money (the "rand"), but you can mentally translate this to "dollar" if you like.
The video above provides a visual example (no words!) about how to convert a number between standard, expanded and word form.
Digits to the left of the decimal point represent whole numbers; digits to the right of the decimal point represent parts or fractions of numbers.
Study and practice
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