solve routine and non routine involving addition and/or subtracting fractions

• Solve routine and non-routine problems involving addition and/or subtraction of fractions using appropriate problem solving strategies and tools
• Routine problem


  Can easily be solved using at least one arithmetic operation and/or ratio
• Non-routine problem


  Requires analysis, manipulation or derivation of formulas, can be solved in multiple ways, encourages group discussion
• Phrases used in addition of numbers


  • Plus
  • The sum of
  • The total of
  • Increase by
  • More than
  • Added to
• Phrases used in subtraction of numbers

  • The difference of
  • Reduce by
  • Diminish by
  • Subtract from
  • Subtracted two
• Solving problems involving addition/subtraction of fractions


  1. Translate problem into mathematical symbol

  2. Find least common denominator (LCD) of fractions

  3. Divide LCD by denominator and multiply by numerator to get new numerator

  4. Add/subtract whole numbers and numerators

  5. Write answer with LCD as denominator