# Lesson Worksheet: Common Denominators Mathematics • 4th Grade

In this worksheet, we will practice finding a common denominator of two proper fractions using models or listing multiples and using this to write both fractions over the same denominator.

**Q1: **

Find the LCD of the following pair of fractions: and .

**Q2: **

Write the common denominator of the fractions and .

**Q3: **

Given the following fractions, which of the following models represents the common denominator?

- A
- B
- C
- D
- E

**Q4: **

Nader says a common denominator of the fractions and is 2.

Is this correct?

- AYes
- BNo

Which of these is a common denominator of the fractions?

- A2
- B6
- C4
- D3
- E1

**Q5: **

Anthony divides a tart into 4 slices and Michael divides another tart of the same size into 5 slices. In how many slices can they now cut their tarts to get same-sized slices?

**Q6: **

Jacob has drawn the model area of both and as shown.

Which of the following models expresses the common denominator of the two fractions?

- A
- B
- C
- D
- E

**Q7: **

Consider the two fractions and .

What is the denominator of ?

What is the denominator of ?

Which of the following is a common denominator for the two fractions?

- A1
- B2
- C3
- D6
- E11

**Q8: **

Select a common denominator of the fractions , , and .

- A30
- B2
- C10
- D5
- E6

**Q9: **

Which of the following pairs of fractions are equivalent to and ?

- A and
- B and
- C and
- D and
- E and

**Q10: **

Rewrite the fractions and as two fractions with a common denominator.

- A and
- B and
- C and
- D and
- E and