Curriculum  /  Math  /  2nd Grade  /  Unit 5: Adding and Subtracting Within 1,000  /  Lesson 22

Adding and Subtracting Within 1,000

Lesson 22

Math

Unit 5

2nd Grade

Lesson 22 of 25

Objective

Solve two-step word problems using strategies to solve within 100.

Student-Facing

I can solve two-step word problems within 100. 

Common Core Standards

Core Standards

  • 2.NBT.B.5 — Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
  • 2.OA.A.1 — Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

Foundational Standards

  • 1.NBT.C.4
  • 1.NBT.C.5
  • 1.NBT.C.6
  • 1.OA.A.1
  • 1.OA.D.8

Criteria for Success

  1. Solve two-step word problems involving situations with addition and subtraction.
  2. Represent word problems using equations and tape diagrams.
  3. Use addition and subtraction to solve within 100.

Warm Up

5-10 minutes

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Anchor Tasks

15-25 minutes

Problem 1

Mr. Ramos and Ms. Vivek are having a competition to see who can make the most cards for the local fire department. So far, Mr. Ramos's class made 15 more cards than Ms. Vivek's class. Ms. Vivek's class made 34 cards. Mr. Ramos's class wants to make 95 cards. How many more cards does Mr. Ramos's class need to make to have a total of 95 cards? Solve. 

Purpose

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Problem 2

Anna helped her aunts make some chicken and beef arepas. They made 25 chicken arepas and after making some beef arepas they had 45 arepas in all. Then they made some additional beef arepas and had 28 beef arepas. How many more beef arepas did they make? Solve.

Purpose

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Problem Set

15-20 minutes

Target Task

5-10 minutes

At the animal shelter, there were 27 cats and some dogs. There were 10 more cats than dogs. Then some dogs were adopted and there were 5 dogs left. How many dogs were adopted?

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

Solve addition computations within 1,000 and explain strategies.

Lesson 23
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Lesson Map

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Topic A: Adding with Mental Strategies

Topic B: Adding within 1,000

Topic C: Subtracting with Mental Strategies

Topic D: Subtracting within 1,000

Topic E: Story Problems and Explaining Addition and Subtracting Thinking

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