Curriculum  /  Math  /  2nd Grade  /  Unit 2: Adding and Subtracting Within 100  /  Lesson 20

Adding and Subtracting Within 100

Lesson 20

Math

Unit 2

2nd Grade

Lesson 20 of 21

Objective

Interpret and create picture graphs and answer related questions.

Student-Facing

I can interpret and create picture graphs and answer questions. 

Common Core Standards

Core Standards

  • 2.MD.D.10 — Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph.

Foundational Standards

  • 1.MD.C.4
  • K.MD.B.3
  • 1.OA.A.1
  • 1.OA.A.2

Criteria for Success

  1. Collect, read, and organize categorical data in a table or tally chart. 
  2. Understand the purpose of a picture graph as a way to represent a data set to be able to see trends and analyze it more easily.
  3. Represent data in a picture graph in which each picture represents one object/vote.
  4. Understand that a key is a part of a graph that explains the meaning and/or value of the symbols in a graph. 
  5. Include all necessary labels in a drawn picture graph, including:
    1. title
    2. category labels
    3. key
  6. Make observations and inferences of the data represented in a picture graph. 
  7. Answer simple put-together, take-apart, and compare problems using information presented in a picture graph.

Tips for Teachers

As per the standard language in 2.MD.D.10, when working with picture graphs, students will be working with a single unit scale. So for the examples students should have exposure to in this unit, there will be a one for one scale. 

Warm Up

5-10 minutes

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Anchor Tasks

15-25 minutes

Problem 1

Use the following picture graph to answer questions. 

a.   What was the least popular snack option? How do you know?

b.   How many students liked animal crackers or applesauce?

c.   How many more students like fruit snacks than applesauce?

Purpose

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Problem 2

At the end of the year, Ms. Jackson’s class goes on a field trip to the local zoo. As they walk through the zoo, the students keep track of the number of animals they see in different habitats. Their observations are shown in the table. An incomplete picture graph is shown below. 

Habitat Number of Animals
Desert 4
Forest 9
Water 3
Rainforest 7

a.   Complete the picture graph.

b.   How many animals did the students see at the zoo in all?

c.   How many of the animals they saw lived in a water or rain forest habitat?

d.   How many more forest animals did they see than desert animals?

Purpose

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Problem 3

a.   Fill in the data table to record the type of pets students in the class have. 

Dogs Cats Fish Hamsters Birds Other No Pets
             

b.   Using the information collected in the data table, complete the picture graph based on your class data.

c.   Which type of pet is the most popular?

d.   Are there any pets that no one in the class has? If so, what kind(s) of pets?

e.   How many people have either cats or hamsters?

Purpose

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Problem Set

15-20 minutes

Target Task

5-10 minutes

The students in Desmond’s class voted on their favorite ice cream flavor. Demond started the picture graph below but did not finish it. 

Vanilla Chocolate Strawberry Oreo
2 3 5 7

a.   Finish the picture graph that Desmond started.

b.   How many students voted? How do you know?

c.   What was the most popular flavor?

d.   What was the least popular flavor?

e.   How many students liked chocolate or oreo?

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

Interpret and create bar graphs and answer related questions.

Lesson 21
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Lesson Map

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

Topic A: Adding & Subtracting with Multiples of Ten

Topic B: Strategies for Adding within 100

Topic C: Strategies for Subtracting within 100

Topic D: Working within 100 and Categorical Data

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