Size of Group in Division

Examples, videos, and solutions to help Grade 3 students understand the meaning of the unknown as the size of the group in division.

Common Core Standards:3.OA.1, 3.OA.3

New York State Common Core Math Grade 3, Module 1, Lesson 4
Download the Worksheets for Grade 3, Module 1, lesson 4 (pdf)

Worksheet Addition & Multiplication Sprint A
Worksheet Addition & Multiplication Sprint B

Lesson 4 Concept Development

Concrete to abstract: Division as fair share, relate the answer to the unknown factor. I bought a new pack of 18 markers. I wanted to share them with Mrs. Sanders, so I divided them into 2 equal groups. How many markers did I give to Mrs. Sanders?
Pictorial to abstract: Analyze a picture to write a division equation wherein the solution tells the size of the group.
Abstract to pictorial: Analyze equations for the meaning of the solution and represent the equation with a drawing.

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Lesson 4 Homework

3. Divide 25 erasers into ______ equal groups.

There are _________ erasers in each group.

8. Mr. Doyle has 20 pencils. He divides them equally between 4 tables. Draw the pencils on each table.
   
   There are ___________ pencils on each table.

20 ÷ ________ = __________

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