4.NF.B.3aGrade 4Common Core State Standards
Fractions as sums of unit fractions
Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
3 free games for this standard
Same Denominator Fraction Builder
Visual Builder
Yr 5–Yr 6
Same Denominator Fraction Builder
Adding & Subtracting FractionsConcept Builder
Build fractions with the same denominator using interactive controls. Develop fluency with fraction notation and visual models.
Add fractions with the same denominator
Proficient
Fraction Builder (Same Denominator)
Visual Builder
Yr 5–Yr 6
Fraction Builder (Same Denominator)
Adding & Subtracting FractionsConcept Builder
Build and explore fractions with the same denominator. Use interactive controls to construct fractions and see visual models update in real time.
Subtract fractions with the same denominator
Proficient
Add Same Denominator Detective
Visual Quiz
Yr 3–Yr 4
Add Same Denominator Detective
Comparing & Ordering FractionsMisconception Buster
Spot errors in fraction additions with the same denominator. Builds the key rule: add numerators, keep the denominator.
Add fractions with the same denominator correctly
Developing