Group Size Practice Worksheet
Eureka Math Support • Grade 3 • Module 1
Lesson 4: Finding the Group Size
Name:
Date:
Goal: Understand the unknown as the size of the group in division. When we know the total and how many groups we have, we divide to find how many are in each group.
1 14 tennis balls are shared equally between 2 cans. Draw dots inside the cans to distribute the balls equally.
Can 1
Can 2
There are balls in each can.
Division: \( 14 \div 2 = \)
Multiplication: \( 2 \times \) \( = 14 \)
2 15 apples are placed equally into 3 baskets. Draw dots in the baskets to share them equally.
Basket A
Basket B
Basket C
Each basket has apples.
Division: \( 15 \div 3 = \)
Multiplication: \( 3 \times \) \( = 15 \)
3 Mr. Ortiz arranges 16 chairs into 4 equal rows. Draw an array of dots with 4 rows to find the chairs in each row.
Number of rows: 4
Chairs in each row:
\( 16 \div 4 = \)
\( 4 \times \) \( = 16 \)
4 In the equation \( 18 \div 3 = 6 \), what does each number represent? Fill in the blanks.
18 represents:
3 represents:
6 represents:
Eureka Math Practice • Module 1, Lesson 4 Page 1 of 2
Part 2: Tape Diagrams & Application
Tape Diagrams & Word Problems
Lesson 4 Practice
5 The tape diagram below shows 24 markers shared equally among 4 art bins. Find the value of the unknown unit \( ? \).
Total = 24 markers
?
?
?
?
Bin 1 Bin 2 Bin 3 Bin 4
Number of groups: 4
Size of 1 group (\( ? \)):
\( 24 \div 4 = \)
6 Draw a tape diagram to model this problem: 20 books are placed equally onto 5 shelves. How many books are on each shelf?
Division Equation: \( 20 \div 5 = \)
Sentence: There are books on each shelf.
7 Application: Marcus has 28 pennies. He puts them into 4 equal stacks. How many pennies are in each stack?
Use RDW (Read, Draw, Write). Draw a tape diagram or equal groups to show your work.
Multiplication sentence: \( 4 \times \) \( = 28 \)
Division sentence: \( 28 \div 4 = \)
Statement: Marcus has
8 Brain Tickler: Elena says that to solve \( 12 \div 3 \), she makes 3 equal circles and deals out 12 dots. Sam says he makes circles with 3 dots in each until he reaches 12.
Which student is using the size of the group method from today's lesson? Explain your thinking.
Eureka Math Practice • Module 1, Lesson 4 Page 2 of 2
Group Size Answer Key
Answer Key Eureka Math • Grade 3 • Module 1
Lesson 4: Finding the Group Size
Teacher Reference Topic B: Division Concepts
Key Concept: In Lesson 4, the quotient always represents the size of the group (partitive division / equal sharing). Students already know how many groups exist; they find how many items belong in 1 group.
1 14 tennis balls shared equally between 2 cans.
Answer: 7 balls
Can 1 (7 balls)
Can 2 (7 balls)
There are 7 balls in each can.
Division: \( 14 \div 2 = \) 7
Multiplication: \( 2 \times \) 7 \( = 14 \)
2 15 apples placed equally into 3 baskets.
Answer: 5 apples
Basket A (5)
Basket B (5)
Basket C (5)
Each basket has 5 apples.
Division: \( 15 \div 3 = \) 5
Multiplication: \( 3 \times \) 5 \( = 15 \)
3 16 chairs into 4 equal rows. Array model solution:
Number of rows: 4
Chairs in each row: 4
\( 16 \div 4 = \) 4
\( 4 \times \) 4 \( = 16 \)
4 Meaning of numbers in \( 18 \div 3 = 6 \):
18 represents: Total number of items (the dividend/whole)
3 represents: Number of equal groups (the divisor)
6 represents: Size of each group (the quotient / items in 1 group)
Eureka Math Answer Key • Module 1, Lesson 4 Page 1 of 2
Answer Key
Tape Diagrams & Word Problems Solutions
Teacher Reference
5 Tape diagram solution (24 markers shared into 4 bins):
Total = 24 markers
6
6
6
6
Bin 1 (6) Bin 2 (6) Bin 3 (6) Bin 4 (6)
Number of groups: 4
Size of 1 group (\( ? \)): 6 markers
\( 24 \div 4 = \) 6
6 Tape diagram model: 20 books placed equally on 5 shelves.
Total = 20 books
4
4
4
4
4
5 equal parts (shelves), each part = 4 books
Division Equation: \( 20 \div 5 = \) 4
Sentence: There are books on each shelf.
