Fraction multiplication with common denominator math quiz, how to multiply fractions with common denominator online games for students in third grade, fourth grade and fifth grade. This quiz on fractions deals with operations on multiplying fractions with common denominators. Knowing that fractions that have common denominators are fractions with a common base value; multiplying by these fractions entails careful calculation. The numerators of both fractions are first multiplied, then the denominators are multiplied after e.g 3/2 × 5/2= 3×5/2×2. As a result of the oneness of the denominators of both fractions, it might be tricky when multiplication is done and as such students must pay close attention to the numbers. It is suitable for third graders and can be easily accessed on computers and mobile devices.