Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (2024)

Objective

Relate subtraction with place value drawings to the standard algorithm.

Student-Facing

I can record my subtraction thinking vertically.

Common Core Standards

Core Standards

The core standards covered in this lesson

  • 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.

    Number and Operations in Base Ten

    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.NBT.B.9— Explain why addition and subtraction strategies work, using place value and the properties of operations.Explanations may be supported by drawings or objects.

    Number and Operations in Base Ten

    2.NBT.B.9— Explain why addition and subtraction strategies work, using place value and the properties of operations.Explanations may be supported by drawings or objects.

Foundational Standards

The foundational standards covered in this lesson

Criteria for Success

The essential concepts students need to demonstrate or understand to achieve the lesson objective

  1. Understand how a subtraction problem can be represented using numbers stacked vertically, aligned by place value as in a place value chart.
  2. Represent a subtraction problem in a vertical model with numbers aligned by place value.

Tips for Teachers

Suggestions for teachers to help them teach this lesson

  • Since this is the first time students will solve subtraction situations with two-digit numbers within 100 using the standard algorithm there are no situations where students need to decompose a ten to subtract in this lesson.
  • In directions, we direct students to record their thinking vertically. Some people may refer to this as stacking where, when using the standard algorithm, students show their mathematical thinking by recording the numbers on top of each other aligned by place value.
  • As a reminder, students do not need to know that the strategy is called the standard algorithm and are not expected to be fluent with this method until fourth grade (4.NBT.B.4); therefore, students' work should be supported with place value drawings as they internalize and make sense of the process.

Warm Up

5-10 minutes

Unlock warm-up activities that help you engage every student and prepare them for the day’s lesson with a Fishtank Plus subscription.

Anchor Tasks

Tasks designed to teach criteria for success of the lesson, and guidance to help draw out student understanding

15-25 minutes

Problem 1

Trevor showed his subtraction with the place value drawing shown below.

Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (1)

a.What subtraction problem was Trevor solving? Write an equation to represent his work.

b.How could you represent this problem and solution vertically, similar to how it is modeled in the place value chart?

Purpose

Create a free account or sign in to access the Purpose for this Anchor Problem.

Problem 2

Model subtracting using a place value chart. Record your thinking vertically.

a.66 - 25 =______

Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (2)

b.58 - 34 =______

Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (3)

Purpose

Create a free account or sign in to access the Purpose for this Anchor Problem.

Facilitation Guidance

Unlock Facilitation Guidance to make the most of each Anchor Task. Find tips to launch tasks, support all students, and synthesize new learning. Download a sample.

Problem Set

15-20 minutes

    Give your students more opportunities to practice the skills in this lesson with a downloadable problem set aligned to the daily objective.

    Target Task

    A task that represents the peak thinking of the lesson - mastery will indicate whether or not objective was achieved

    5-10 minutes

    Model subtracting using a place value chart. Record your thinking vertically.

    a.75 - 22 =

    Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (4)

    b.68 - 36 =

    Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (5)

    Student Response

    Create a free account or sign in to view 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

      Word Problems and Fluency Activities

      Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.

      Lesson 12

      Lesson 14

      Lesson 13 | Adding and Subtracting Within 100 | 2nd Grade Mathematics | Free Lesson Plan (2024)
      Top Articles
      Latest Posts
      Article information

      Author: Pres. Lawanda Wiegand

      Last Updated:

      Views: 6738

      Rating: 4 / 5 (51 voted)

      Reviews: 90% of readers found this page helpful

      Author information

      Name: Pres. Lawanda Wiegand

      Birthday: 1993-01-10

      Address: Suite 391 6963 Ullrich Shore, Bellefort, WI 01350-7893

      Phone: +6806610432415

      Job: Dynamic Manufacturing Assistant

      Hobby: amateur radio, Taekwondo, Wood carving, Parkour, Skateboarding, Running, Rafting

      Introduction: My name is Pres. Lawanda Wiegand, I am a inquisitive, helpful, glamorous, cheerful, open, clever, innocent person who loves writing and wants to share my knowledge and understanding with you.