Addition and Subtraction of Fractions

This applet was inspired by Judah Schwartz’s material “Fraction Workbench - decomposing fractions”. It presents three challenges for writing a proper fraction as a sum or a difference of two proper fractions. To use the applet:
  • Create a new fraction by clicking the New Fraction Button.
  • Click on the operation Add or Subtract.
  • Click on a checkbox to select a challenge - same, or different denominators.     
  • Enter values for A, B, C, and D.
  • Check.
A Challenge question: For option 3: find A, C, and D if B equals the challenge number. Selecting and deselecting the third option will generate new challenge numbers.