Use visual fraction models to add and subtract fractions with the same denominators.

Fractions can be added in different ways: When fractions have the same denominator close denominatorNumber written on the bottom of a fraction. The denominator is the number of equal parts. Eg ...

A lot of students begin by finding a common denominator for the dividend and divisor when dividing by a fraction. And a lot of teachers intervene by saying, "Remember, you only need a common ...

But the same concept holds true. Common Denominator The common denominator model, while not really a picture, demonstrates that the same rules apply to multiplication and division with fractions.