Let's solve each of these problems step by step. The task is to
divide a fraction by a whole number.
🔷 General Rule:
To divide a fraction by a whole number, you can follow this rule:
>
Divide the fraction by the whole number by multiplying the fraction by the reciprocal of the whole number.
That is:
$$
\frac{a}{b} \div c = \frac{a}{b} \times \frac{1}{c}
$$
---
1. $\frac{1}{3} \div 4$
$$
\frac{1}{3} \div 4 = \frac{1}{3} \times \frac{1}{4} = \frac{1 \times 1}{3 \times 4} = \frac{1}{12}
$$
✔ Answer: $\frac{1}{12}$
---
2. $\frac{2}{5} \div 7$
$$
\frac{2}{5} \div 7 = \frac{2}{5} \times \frac{1}{7} = \frac{2 \times 1}{5 \times 7} = \frac{2}{35}
$$
✔ Answer: $\frac{2}{35}$
---
3. $\frac{1}{2} \div 2$
$$
\frac{1}{2} \div 2 = \frac{1}{2} \times \frac{1}{2} = \frac{1 \times 1}{2 \times 2} = \frac{1}{4}
$$
✔ Answer: $\frac{1}{4}$
---
4. $\frac{2}{5} \div 9$
$$
\frac{2}{5} \div 9 = \frac{2}{5} \times \frac{1}{9} = \frac{2 \times 1}{5 \times 9} = \frac{2}{45}
$$
✔ Answer: $\frac{2}{45}$
---
5. $\frac{1}{2} \div 6$
$$
\frac{1}{2} \div 6 = \frac{1}{2} \times \frac{1}{6} = \frac{1 \times 1}{2 \times 6} = \frac{1}{12}
$$
✔ Answer: $\frac{1}{12}$
---
6. $\frac{4}{10} \div 2$
First, simplify $\frac{4}{10}$:
$$
\frac{4}{10} = \frac{2}{5}
$$
Now divide:
$$
\frac{2}{5} \div 2 = \frac{2}{5} \times \frac{1}{2} = \frac{2 \times 1}{5 \times 2} = \frac{2}{10} = \frac{1}{5}
$$
✔ Answer: $\frac{1}{5}$
---
✔ Final Answers:
1. $\frac{1}{3} \div 4 = \boxed{\frac{1}{12}}$
2. $\frac{2}{5} \div 7 = \boxed{\frac{2}{35}}$
3. $\frac{1}{2} \div 2 = \boxed{\frac{1}{4}}$
4. $\frac{2}{5} \div 9 = \boxed{\frac{2}{45}}$
5. $\frac{1}{2} \div 6 = \boxed{\frac{1}{12}}$
6. $\frac{4}{10} \div 2 = \boxed{\frac{1}{5}}$
Let me know if you'd like a visual explanation or help with word problems!
Parent Tip: Review the logic above to help your child master the concept of division of fraction worksheet.