Build the solution one fraction step at a time. The equation stays in front of you while the visual model explains why each step works.
Enter your own proper fractions, or use Random Problem for a simple practice question. Random problems use simple fractions in lowest terms with denominators from 2–5.
The denominator tells us how the whole is divided into equal pieces. Halves and thirds are different-size pieces, so 1 half + 1 third cannot be counted as “2 of the same pieces.”
A common denominator rewrites both fractions using equal-size pieces. The amount does not change; only the way the whole is divided changes.
The shaded amount in each fraction stays the same. We simply cut the pieces into sixths so both fractions use the same unit.
The original problem stays visible while you build each new line underneath it.
For unlike denominators, find the least common denominator and rewrite the fractions.
The bars recut the same shaded amount into smaller equal pieces without replacing the fraction equation.
Once the pieces match, work with the numerators while keeping the common denominator.
Reduce the final fraction while keeping the completed work visible.
This Tutor keeps the fraction equation at the center of every step. The visual bars support the math rather than replacing it, helping students connect the picture to the standard written method.
Use Show Me One Step when a student is stuck. It completes only the active part of the equation so the student can continue independently.
A student may try 1/2 + 1/3 = 2/5. The numerators can count pieces, but the denominator describes the size of those pieces. Since halves and thirds are not the same size, they must first be rewritten using a common denominator.
Yes. Leave the boxes blank and enter your own proper fractions, or choose Random Problem for a simple practice question.
Yes. Other common denominators can work mathematically, but this Tutor asks for the least common denominator so students practice the most efficient equivalent fractions.
Yes. Choose Subtraction and the Tutor will guide the same-size-pieces process before taking one fraction away from the other.
Yes. Show Me One Step completes only the current step and then returns control to the student.
No. This first version focuses on proper fractions so the visual meaning of common denominators stays clear.
Review equivalent values or comparison whenever common denominators still feel unfamiliar.