Understanding Fraction Subtraction
Fractions with different denominators can't be subtracted directly!
Just like you can't subtract apples from oranges, you can't subtract fractions when the bottom numbers (denominators) are different. But don't worry - we have a special trick to make the denominators match!
How to Subtract Fractions with Unlike Denominators
1️⃣ Find a common denominator - the smallest number both denominators divide into
2️⃣ Convert both fractions to equivalent fractions with this new denominator
3️⃣ Subtract the numerators (top numbers) and keep the denominator the same
4️⃣ Simplify your answer if possible
Let's Practice Together!
Example 1: Subtract ½ - ⅓
Step 1: Find common denominator. For 2 and 3, it's 6.
Step 2: Convert fractions: ½ = ³⁄₆ and ⅓ = ²⁄₆
Step 3: Subtract numerators: ³⁄₆ - ²⁄₆ = ¹⁄₆
Answer: ½ - ⅓ = ¹⁄₆
Example 2: Subtract ⅘ - ½
Step 1: Find common denominator. For 5 and 2, it's 10.
Step 2: Convert fractions: ⅘ = ⁸⁄₁₀ and ½ = ⁵⁄₁₀
Step 3: Subtract numerators: ⁸⁄₁₀ - ⁵⁄₁₀ = ³⁄₁₀
Answer: ⅘ - ½ = ³⁄₁₀
Parent Tips 🌟
- Use real-world examples: Cut pizzas or pies to visually demonstrate how fractions with different denominators work.
- Practice LCM first: Make sure your child is comfortable finding Least Common Multiples before tackling fraction subtraction.
- Make it a game: Create fraction subtraction flashcards and turn practice into a timed challenge with small rewards.