Multiplying Fractions
3-5
1
Dividing Fractions: Keep, Change, Flip
Lesson Details
Grade Level
6-8
Duration (minutes)
1
Summary
A Grade 6-8 math lesson teaching the "keep, change, flip" method for dividing fractions — keep the first fraction, change division to multiplication, and flip the second fraction by finding its reciprocal — then multiply and simplify, using 2/3 ÷ 1/4 = 8/3 as the worked example.
Student Worksheet: Dividing Fractions: Keep, Change, Flip
Teacher Note: Students can watch the video lesson above and answer the questions. Click the “Teacher Answer Key” dropdown below when you are ready to review the solutions!
Key Concepts:
• What Fraction Division Means: Dividing fractions asks how many groups of the second fraction fit inside the first.
• Keep, Change, Flip: Keep the first fraction the same, change the division sign to multiplication, and flip the second fraction by finding its reciprocal.
• Reciprocal: A reciprocal switches the numerator and denominator of a fraction.
• Finishing Up: After flipping, multiply the numerators, multiply the denominators, and simplify if possible.
Instructions: Read each question carefully and write your answer in the space provided.
- Question 1: What are the three steps of the “keep, change, flip” method?
- Question 2: What is the reciprocal of 1/4?
- Question 3: Rewrite 2/3 ÷ 1/4 after applying keep, change, flip.
- Question 4: Multiply the numerators and denominators from Question 3. What is the answer before simplifying?
- Question 5: Is 8/3 already simplified? How do you know?
Click to reveal Teacher Answer Key
1. Keep the first fraction the same, change division to multiplication, and flip the second fraction (find its reciprocal).
2. 4/1.
3. 2/3 × 4/1.
4. 2 × 4 = 8 and 3 × 1 = 3, so the answer is 8/3.
5. Yes, because 8 and 3 share no common factor greater than 1.
Disclaimer: This worksheet was generated with AI assistance based on original video content. It is intended for educational reference only. Teachers are encouraged to review and adjust questions to fit their curriculum standards before classroom use.
🎯 Extension Activity: Divide 3/5 ÷ 2/3 using keep, change, flip. Show every step, then simplify your final answer if possible.