Adding Fractions with Pizza Pieces
Year 3 & 4 Mixed Class Learning to add fractions using pizza! WALT: Add fractions with the same denominator
WALT: We Are Learning To
Add fractions with the same denominator Use pizza pieces to understand fractions Show our work using pictures and numbers Explain what the denominator means
Meet Chris and Sam's Pizza Problem
Chris has 2 pieces of pizza Sam has 1 piece of pizza The pizza is cut into 6 equal pieces How many pieces do they have altogether?
Understanding Sixths
The pizza is cut into 6 equal pieces Each piece is called 'one sixth' or 1/6 Chris has 2/6 (two sixths) Sam has 1/6 (one sixth) The bottom number (6) tells us how many equal pieces the whole pizza was cut into
Think and Discuss
Why do you think the bottom number (denominator) stays the same when we add fractions? What would happen if we tried to add pieces from different sized pizzas?
Adding Our Pizza Pieces
Chris has 2/6 Sam has 1/6 2/6 + 1/6 = ? Add the top numbers: 2 + 1 = 3 Keep the bottom number the same: 6 Answer: 3/6
Your Turn: Pizza Practice
Use your fraction pieces to solve: 3/8 + 2/8 = ? 1/4 + 2/4 = ? 4/10 + 3/10 = ? Draw pictures to show your work!
Concrete to Abstract
{"left":"Using pizza pieces and fraction circles\nDrawing bar models and pictures","right":"Writing number sentences\nExplaining our thinking in words"}
Challenge Time!
Year 3: Find different ways to make 4/7 Example: 1/7 + 3/7 = 4/7 Year 4: Try adding fractions that make more than 1 whole Example: 5/6 + 4/6 = 9/6 = 1 3/6
What We've Learned Today
Fractions with the same denominator can be added together We add the numerators (top numbers) We keep the denominator (bottom number) the same Pizza pieces help us visualize fractions Drawing pictures helps us solve problems