Printable Completing Whole Numbers Worksheets
Printable completing whole numbers worksheets for 3rd through 5th grade, with an answer key on every sheet. The sets below cover 3 different skills, so you can start where your child actually is. Available as visual guides.
Targeted Practice by Skill
About Completing Whole Numbers
What this skill is
Completing whole numbers finds the missing fractional part needed to form 1 whole (e.g., 3/8 + _ = 8/8 = 1 whole, missing part is 5/8).
When children learn it
Fraction whole complements are taught in 3rd and 4th grade, aligned to 3.NF.A.3.
Teaching Tips
- Subtract numerator from denominator to find the missing complement numerator.
- Use circle fraction pies to see the unshaded missing pie slice.
Common Mistakes
- Changing the denominator when finding missing complement numerators.
- Subtracting numerator from 10 instead of denominator.
More Fractions Concepts
Equal PartsIntroduction to FractionsModeling Fractions with PicturesReading and Writing FractionsNumerator and DenominatorFraction of a NumberFractions on a Number LineAdding FractionsComparing FractionsEquivalent FractionsFraction Word ProblemsOrdering FractionsSubtracting FractionsFractions and DecimalsMixed Numbers and Improper FractionsMultiplying FractionsSimplifying FractionsDividing FractionsMixed Operations with Fractions