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Math Help: Decimals

Refresh your competency in the various areas of Mathematics.

DECIMALS

  
Decimals are . . .   -2.3, -.554, -.01, 1.9999998, 2.1, etc.
 
Use the tabs above to navigate to each module.

Decimal number basic
s


Place value and the decimal number system  

Any study of decimal numbers must begin with a good understanding of place value. 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.

Comparing and ordering decimals 
In this module, you can study how to compare two decimal numbers to see which is larger and how to put a list of decimal numbers in order from least to greatest.

Rounding to a decimal place   
In this module, you can study how to round numbers to a whole number place or to a decimal place.

Significant figures   
In this module, you can study what a significant figure is and how to round to a significant figure.

Standard Form and Engineering Notation  
In this module, you can study two different ways to write very large and very small numbers in a format that makes them easier to use.


Calculating with decimal numbers

Adding decimals   
In this module you can study how to add decimal numbers.

Subtracting decimals  
In this module, you can study how to subtract decimal numbers. 

Multiplying decimals   
In this module, you can learn how to multiply two decimal numbers together.

Dividing decimals 
In this module, you can study how to divide one decimal number by another. 


Representing and ordering numbers

Converting decimals to fractions 
In this module you can study how to convert a decimal number to a fraction.

Converting decimals to percents   
In this module you can study how to convert a decimal number to a percent.

Converting between fractions, decimals and percents  
In this module you can study how to convert between fractions, decimals and percents.

Ordering fractions, decimals and percents
In this module you can study how to put a list of fractions, decimals and percents in order from smallest to largest number.

 

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