Curriculum  /  Math  /  2nd Grade  /  Unit 7: Working with Even, Odd, and Equal Groups  /  Lesson 4

Working with Even, Odd, and Equal Groups

Lesson 4

Math

Unit 7

2nd Grade

Lesson 4 of 12

Objective

Represent even numbers as a total of two equal addends.

Student-Facing

I can represent even numbers as a total of two equal addends.

Common Core Standards

Core Standards

  • 2.OA.C.3 — Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

Foundational Standards

  • 1.OA.D.7

Criteria for Success

  1. Represent even numbers as a sum of equal addends. 
  2. Explain if a number or total is even or odd based on whether the total can be represented by a total of equal addends.

Tips for Teachers

Lesson Materials

  • Optional: Manipulatives (25 per student)

Warm Up

5-10 minutes

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Anchor Tasks

15-25 minutes

Problem 1

Mrs. Peters wants to give her two neighbors the same number of tulip bulbs. She can either share 8 tulip bulbs or 9 tulip bulbs. 

a.   How many should she share so that each neighbor gets the same number? 

b.   Write an equation to show how each neighbor gets the same number of tulip bulbs.

_____ + _____ = _____

c.   Extend:

If she wanted to give one neighbor an even number of tulip bulbs and one neighbor an odd number of tulip bulbs, how many should she share?

d.   Extend:

Can she give both neighbors an odd amount of tulip bulbs if she shares 8 or 9 tulip bulbs?

Purpose

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Problem 2

What are other amounts of tulip bulbs between 7 and 20 that could be shared equally between two people? Are those amounts even or odd? Show your thinking with an equation that represents sharing an even number of tulip bulbs.

Purpose

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Problem Set

15-20 minutes

Target Task

5-10 minutes

Problem 1

Select the number that can be represented as a total of 2 equal addends. Write an equation to show your thinking. 

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Student Response

Problem 2

Maggie says that you can tell if a number is even if it has a doubles fact. Do you agree with Maggie? Why or why not? Give an example using a number between 9 and 20 to support your thinking.

Student Response

Additional Practice

Daily Word Problems, Warm Ups, and Center Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.

Word Problems and Fluency Activities

Next

Determine if numbers are even or odd and explain thinking.

Lesson 5
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Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Even and Odd Numbers

Topic B: Composing and Analyzing Arrays

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