Multiplication Magic: Exploring Equal Groups
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Multiplication Magic: Exploring Equal Groups
Grade 3 Mathematics Properties of Multiplication Module 1 - Lesson 1
I Can... Learning Goals
I can count by twos fluently I can identify equal groups in real-world situations I can use repeated addition to solve problems I can write multiplication sentences for equal groups
Fluency Warm-Up: Counting by Twos
Start at 2 and count to 20 Turn and talk to your partner Share patterns you notice Practice together as a class
Turn and Talk: What Do You Notice?
Look at this pattern: 2, 4, 6, 8, 10... What patterns do you see? How does each number relate to the one before it? Share your thinking with your neighbor!
Application Problem: Math Club
There are 3 tables in math club Each table has 4 students How many students are in math club altogether? Let's solve this step by step!
Let's Draw It Out!
Draw 3 circles for the tables Put 4 stick figures in each circle Count all the students What do you notice about the groups?
Different Ways to Solve
{"left":"Counting: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12\nRepeated Addition: 4 + 4 + 4 = 12","right":"Skip Counting: 4, 8, 12\nEqual Groups: 3 groups of 4"}
Introducing Multiplication
3 groups of 4 can be written as 3 × 4 The × symbol means 'groups of' 3 × 4 = 12 This is much faster than counting by ones!
Hands-On Practice with Counters
Use counters to make equal groups Try: 2 groups of 5 Try: 4 groups of 3 Write the multiplication sentence for each
What's the Same? What's Different?
Compare 2 × 5 and 5 × 2 Make both with your counters Do you get the same answer? What do you notice about the groups?
Unit Form Practice
2 groups of 5 = 2 fives 4 groups of 3 = 4 threes 6 groups of 2 = 6 twos This helps us think about multiplication!
Problem Set Practice
Work independently on practice problems Draw pictures for each problem Write both repeated addition AND multiplication Check your work with a partner