Fraction Flip Anchor Chart
Fraction Flip Guide
Dividing Unit Fractions by Whole Numbers
The Mission
When we divide a unit fraction by a whole number, we use the K-C-F algorithm to find the answer.
K
KEEP IT
Keep the first unit fraction exactly the same.
C
CHANGE IT
Change the division sign (÷) to multiplication (×).
F
FLIP IT
Flip the whole number into its reciprocal (flip the 1 on top).
The Algorithm in Action: \( \frac{1}{4} \div 3 \)
Keep
\( \frac{1}{4} \)
Change
\( \times \)
Flip
\( \frac{1}{3} \)
= \( \frac{1}{12} \)
Product Found
Whole Number Tip
Think of \(5\) as \( \frac{5}{1} \). When you flip it, it becomes \( \frac{1}{5} \).
Estimation Check
Your answer should always be smaller than the starting fraction.
Fraction Flip Worksheet
Fraction Flip Practice
Division: Unit Fraction by Whole Number
Name: __________________________
Date: __________________________
Steps
KEEP The 1st Fraction
CHANGE ÷ to ×
FLIP 2nd Number
Problem 01
\( \frac{1}{3} \div 4 = \) ______
Show your K-C-F steps:
Problem 02
\( \frac{1}{2} \div 5 = \) ______
Show your K-C-F steps:
Problem 03
\( \frac{1}{8} \div 2 = \) ______
Show your K-C-F steps:
Problem 04
\( \frac{1}{5} \div 3 = \) ______
Show your K-C-F steps:
Master Challenge
Maya has \(\frac{1}{4}\) of a gallon of blue paint. She wants to split it equally among 6 small jars. How much paint will go in each jar?
Workspace
Final Answer:
Fraction Flip Answer Key
Fraction Flip Answer Key
Teacher Resource • DO NOT DISTRIBUTE
Problem 01
\( \frac{1}{3} \div 4 = \frac{1}{12} \)
K-C-F Steps:
\( \frac{1}{3} \times \frac{1}{4} = \frac{1 \times 1}{3 \times 4} = \frac{1}{12} \)
Problem 02
\( \frac{1}{2} \div 5 = \frac{1}{10} \)
K-C-F Steps:
\( \frac{1}{2} \times \frac{1}{5} = \frac{1 \times 1}{2 \times 5} = \frac{1}{10} \)
Problem 03
\( \frac{1}{8} \div 2 = \frac{1}{16} \)
K-C-F Steps:
\( \frac{1}{8} \times \frac{1}{2} = \frac{1 \times 1}{8 \times 2} = \frac{1}{16} \)
Problem 04
\( \frac{1}{5} \div 3 = \frac{1}{15} \)
K-C-F Steps:
\( \frac{1}{5} \times \frac{1}{3} = \frac{1 \times 1}{5 \times 3} = \frac{1}{15} \)
Master Challenge Solution
Equation
\( \frac{1}{4} \div 6 = \) ?
Algorithm
\( \frac{1}{4} \times \frac{1}{6} = \frac{1}{24} \)
Answer: \( \frac{1}{24} \) gallon of paint.
