Understanding Like Denominators
Fractions with like denominators have the same bottom number!
This means the pieces are the same size, so we can easily add or subtract the top numbers (numerators)
while keeping the bottom number (denominator) the same.
Same denominator = Same size pieces
\(\frac{2}{5}\)
\(\frac{3}{5}\)
How to Add/Subtract Fractions with Like Denominators
1️⃣ Make sure the denominators are the same
2️⃣ Add or subtract the numerators (top numbers)
3️⃣ Keep the denominator (bottom number) the same
4️⃣ Simplify if needed (we'll learn this later!)
Let's Practice with Examples!
Ribbon Subtraction
You have a ribbon that's \(\frac{5}{6}\) of a meter long. You cut off \(\frac{2}{6}\) for a craft project. How much ribbon remains?
Try it yourself with different numbers:
\(\frac{}{6}\) -
\(\frac{}{6}\) =
\(\frac{3}{6}\)
Parent Tips 🌟
- Kitchen math: Use measuring cups to show how \(\frac{1}{4}\) cup + \(\frac{2}{4}\) cup = \(\frac{3}{4}\) cup.
- Building blocks: Use LEGO bricks of the same size to demonstrate fraction addition and subtraction.
- Fraction war: Play a card game where you deal fraction cards and add/subtract them, with the largest sum winning.
- Real-world problems: "If you ate \(\frac{3}{8}\) of the cookies and I ate \(\frac{2}{8}\), how much did we eat together?"