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Please go to the NON-FLASH version of Design Addition of Fractions with Circle Models.


Add with Circle Models uses circles to demonstrate addition of fractions.

You can input the two addends for an addition of fractions example. The sum of the addends cannot exceed 6. Press the <OK> button and the circles fractions for the addends and the sum will appear.

Uncheck the <EXPLAIN> check box to turn off the answer and the explanation. You can ask your students to complete the number sentence.

Uncheck the <SHOW INPUT> check box to make the input dialog boxes work like a password input boxes, hiding the numbers you input. With <EXPLAIN> and <SHOW INPUT> unchecked you can ask your students to write a number sentence that explains the picture.

With <EXPLAIN> and <SHOW COLOR> unchecked you can ask your students to complete the picture by shading the circles.


Start with adding like fractions such as 1 3/6 and 2 2/6. Then enter 1 1/2 and 2 1/3 to see how the common denominator of 6 is used.

Enter 5/6 and 5/6 to see how the mixed number 1 2/3 results. Then add 1 5/6 and 3 5/6 to see how the mixed number 5 2/3 results.


You may copy the screen by pressing <Print Screen> on the keyboard. This copies the screen into Windows Clipboard™. The screen can then be pasted into Windows Paint™ or your favorite imaging program. Windows Paint™ will allow you to crop, print, or save the image.

Windows 7 users can use the Snipping Tool™ to capture any part of the screen you wish. These images can be edited and saved in PNG, GIF(recommended) or JPEG formats.