**In this module, you can study the concept of place value and the decimal number system.**

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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**

- Study place valueStudy the place value system.
- Study the decimal number systemRead about the decimal number system at mathsisfun.com. When you're done reading, you can take a self-quiz to check your understanding.
- Download an expanded-to-standard form worksheetDesign and print a worksheet with problems where you convert expanded form to standard form.
- Download a standard-to-expanded form worksheetDesign and print a worksheet of problems for converting standard form to expanded form.
- Quiz yourself on place valueSee if you understand the value of each position of a decimal number at onlinemathlearning.com. (This quiz only looks at digits to the left of the decimal place.)

0.00 min addition (+), subtraction (-), multiply (x), divide (÷)

1.19 min decimal point

2.43 min C, CE and backspace

4.19 min square, square root & fractions

6.17 min percentage (%)