How to use this sheet

  • Have the child say each problem in words with the unit: "2 eighths plus 3 eighths is 5 eighths."
  • Check that the denominators match before starting each problem.
  • For word problems, draw a bar cut into the right number of parts and shade the amounts.

Common mistakes

  • Adding the bottom numbers too, so 2/8 + 3/8 becomes 5/16. The parts are still eighths.
  • Forgetting to simplify, or to write an answer more than 1 as a mixed number when asked.
  • Subtracting the smaller top number from the larger whatever the order. Read the problem again.

Related worksheets

See all 4th Grade Math