Lesson Archive

February 28, 2008

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Lesson Overview

How to add Decimals that have different numbers of decimal places

• Write one number below the other so that the bottom decimal point is directly below and lined up with the top decimal point.
• Add each column starting at the right side.

Example: Add 3.27 + 11.48

  3.27
+11.48   
 14.75

How to subtract decimals that have different numbers of decimal places

• Write the number that is being subtracted from. Write the number that is being subtracted below the the first number so that the decimal point of the bottom number is directly below and lined up with the top decimal point.
• Add zeros to the right side of the decimal with fewer decimal places so that each decimal has the same number of decimal places.
• Subtract the bottom number from the top number.

Example: Subtract 11.48 - 3.27

 11.48
- 3.27   
  8.21

Now Complete the lesson!

Learning Lesson from Alberta learning	Select lessons, Adding and Subtracting Decimals.  Watch this movie with interactive examples and complete the interactive examples
Werewolf explanation and examples	Play each lesson in order to listen to this scary werewolf explain adding and subtracting decimals.  CLICK ON LAUNCH LESSON
NOT AVAILABLE IN ARCHIVE	YPP custom test Adding and Subtracting Decimals