6th grade · Math · Unit 3 of 19
Dividing Fractions
How many fit?
What your child practices
Dividing a fraction by a fraction by multiplying by the reciprocal, and solving “how many servings” and “how many pieces” problems.
Texas Essential Knowledge and Skills (TEKS) teks student expectation: 6.3(A); 6.3(E) · dividing fractions by multiplying by the reciprocal
How we explain it
Children can open this short lesson before they practice.
- To divide by a fraction, multiply by its reciprocal (flip it).
- Keep the first fraction, change ÷ to ×, flip the second.
- Simplify the answer.
Example: What is 3/4 ÷ 1/8? 3/4 × 8/1 = 24/4. 24/4 = 6. Answer: 6
Dividing Fractions in Texas
In the Texas Essential Knowledge and Skills (TEKS), this is unit 3 of 19 in 6th grade Math, after Decimal × and ÷ and before Mixed Numbers & Ratios.
Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.
Source: Texas Education Agency (TEA)
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
A trail is 5/6 mile long. Signs are placed every 1/6 mile. How many sections does that make?
- 6
- 5
- 4
- 10
5
Hint: 5/6 ÷ 1/6 = 5/6 × 6/1.
Question 2
What is 3/4 ÷ 2/5?
3/4 ÷ (2/5) = ?
- 8/15
- 3/10
- 2
- 15/8
15/8
Hint: Multiply by the reciprocal: 3/4 × 5/2.
Question 3
How many 3/4-cup servings are in 6 cups of trail mix?
- 8
- 5
- 18
- 9
- 10
8
Hint: 6 ÷ 3/4 = 6 × 4/3.
Question 4
Which multiplication has the same answer as 5/7 ÷ 8/9?
- 5/7 × 8/9
- 7/5 × 9/8
- 5/7 × 9/8
- 7/5 × 8/9
5/7 × 9/8
Hint: Dividing by a fraction is the same as multiplying by its reciprocal (flip the second fraction).
Question 5
A trail is 1/2 mile long. Signs are placed every 1/8 mile. How many sections does that make?
- 4
- 5
- 8
- 3
4
Hint: 1/2 ÷ 1/8 = 1/2 × 8/1.
Question 6
What is 4/5 ÷ 1/3?
4/5 ÷ (1/3) = ?
- 13/5
- 12/5
- 4/15
- 5/12
12/5
Hint: Multiply by the reciprocal: 4/5 × 3/1.