Adding Fractions with Unlike Denominators

Grade 4 Mathematics Building Common Denominators Using Visual Models

I Can Statements

I can find common denominators to add fractions with unlike denominators I can use visual models to represent fraction addition I can solve word problems involving fractions with different denominators I can explain my reasoning using fraction models

Think About This Problem

If I have 1/4 of a pizza and you have 1/3 of a pizza, how much pizza do we have altogether?

Finding Common Denominators

Step 1: Look at the denominators (bottom numbers) Step 2: Find the least common multiple Step 3: Convert to equivalent fractions Step 4: Add the numerators Step 5: Simplify if needed

Visual Model: 1/4 + 1/3 = 7/12

Practice Time: Partner Work

Work with your partner to solve these problems Use fraction strips to help you Problem 1: 1/2 + 1/6 Problem 2: 2/3 + 1/4 Explain your steps to your partner

Differentiation Strategies

{"left":"Support Learners: Use fraction strips and visual models, work in guided small groups, focus on one step at a time\nAdvanced Learners: Try fractions with denominators like 8 and 12, create word problems for classmates, explain multiple solution strategies","right":"Dyslexia-Friendly: Use clear fonts and spacing, read problems aloud, encourage oral explanations over written work\nAll Learners: Use manipulatives, think-pair-share discussions, self-assessment with 'I can' statements"}

Success Criteria & Next Steps

Today you demonstrated success by finding common denominators You used visual models to add fractions with unlike denominators You explained your reasoning to partners Tomorrow: We'll explore tenths and hundredths Coming up: Real-world fraction word problems