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Lesson Plan Template

  • Grade

  • Subject

  • Section

First

Math

​

  • Competency

Addition word problems up to 20 (1)

  • Aligned Standards

Operations and Algebraic Thinking

  • Strand

1.OA.A.2

  • Vocabulary

  • Sum: The result of adding two or more numbers.
  • Addends: The numbers that are added together.
  • Word Problem: A math problem written in the form of a story.

Triple Word Challenges

Add Three Numbers in Word Problems

Prerequisite Skill

Add Three Numbers

Materials and Preparation

  • Whiteboard and markers
  • Word problem cards
  • Manipulatives (e.g., counters or base-ten blocks)
  • TeachTastic Worksheet Pack for adding three numbers
  • Pencils and erasers

Learning Objectives

  • Students will understand how to identify and extract numbers from word problems.
  • Students will be able to add three numbers accurately.
  • Students will demonstrate their ability to solve word problems involving the addition of three numbers.

Introduction

Begin the lesson by discussing how addition is used in everyday life. Provide an example problem: "Yesterday, a farmer picked 3 apples, 4 oranges, and 5 pears. How many fruits did the farmer pick in all?" Ask students how they would solve this problem.

Explicit Instruction/Teacher modeling

Explain the steps to solve a word problem involving three numbers:

  1. Read the problem carefully.
  2. Identify the numbers that need to be added.
  3. Write the numbers down in an addition equation.
  4. Add the first two numbers, then add the third number to the sum. Using the example problem, demonstrate:
  • 3+4+5=123 + 4 + 5 = 12
  • The farmer picked 12 fruits in all.

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Guided Practice

Provide students with new word problems and solve them together:

  1. "A toy store sold 2 dolls, 3 cars, and 4 trucks in one day. How many toys did the store sell?"
    • Solution: 2+3+4=92 + 3 + 4 = 9
  2. "At a party, there were 5 balloons, 7 streamers, and 3 party hats. How many decorations were there in total?"
    • Solution: 5+7+3=155 + 7 + 3 = 15 Use the TeachTastic Worksheet Pack to guide practice problems.

Independent Practice

Distribute the independent practice worksheets from the TeachTastic Worksheet Pack. Students will complete problems on their own, such as:

  • "A bakery sold 1 chocolate cake, 6 cupcakes, and 3 pies. How many baked goods did the bakery sell?"
    • Solution: 1+6+3=101 + 6 + 3 = 10 Circulate the room to provide assistance as needed and ensure students are correctly adding the numbers.

Differentiation

Support

  • Offer additional practice with manipulatives for students who need it.
  • Provide step-by-step written guides for solving word problems.
  • Pair students who are struggling with a peer tutor for additional support.

Step-by-Step Guide for Solving Word Problems

  1. Read the Problem Carefully:

    • Start by reading the entire word problem thoroughly to understand the context and what is being asked.

  2. Identify the Numbers:

    • Look for the numbers mentioned in the problem. These are usually the quantities that need to be added together.

  3. Underline or Highlight Key Information:

    • Underline or highlight the important numbers and keywords in the problem that indicate addition, such as "total," "sum," "altogether," or "in all."

  4. Write the Addition Equation:

    • Write down the numbers in the order they appear in the problem, separated by plus signs. For example, if the problem states, "A baker made 3 cakes, 2 pies, and 4 cookies," write: 3+2+4.

  5. Add the First Two Numbers:

    • Add the first two numbers in the equation. For example: 3+2=5.

  6. Add the Third Number:

    • Take the sum from the previous step and add the third number to it. For example: 5+4=9.

  7. Write the Final Sum:

    • The final sum is the answer to the word problem. In this example, the baker made 9 items in total.

Extension

  • Provide more challenging problems involving larger numbers.
  • Incorporate the addition of three numbers into multi-step word problems.
  • Challenge students to create their own word problems involving the addition of three numbers.

Assessment

Use the assessment worksheets from the TeachTastic Worksheet Pack to evaluate students' mastery of adding three numbers in word problems. Include a mix of straightforward and more complex problems to ensure comprehensive understanding.

Review and closing

Summarize the key points of the lesson, emphasizing the importance of reading word problems carefully and accurately adding numbers. Address any common misconceptions and answer any student questions. Encourage students to share their thoughts on the lesson and any challenges they faced.

Misconceptions

  • Students may add the numbers in the wrong order.
    • Clarify that the order of addition does not affect the sum.
  • Students may misinterpret the word problem and add the wrong numbers.
    • Emphasize the importance of carefully identifying the numbers to be added.
  • Students may forget to add all three numbers.
    • Reinforce the need to add each number step by step and check their work.
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