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Lesson Plan Template

  • Grade

  • Subject

  • Section

First

Math

​

  • Competency

Addition, two digits (1)

  • Aligned Standards

Number and Operations in Base Ten

  • Strand

1.NBT.C.4

  • Vocabulary

Sum: The result of adding two or more numbers.
Multiple of Ten: A number that is the product of 10 and another whole number (e.g., 10, 20, 30).

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Add A Multiple of Ten to a 2-Digit Number

Prerequisite Skill

Add Using Models to Represent a Multiple of Ten and A Two-Digit Number

Materials and Preparation

  • Whiteboard and markers
  • TeachTastic Worksheet Pack for Adding a Multiple of Ten and a Two-Digit Number
  • Manipulatives for hands-on practice (e.g., counters, base-ten blocks)
  • Chart paper and markers for group activities

Learning Objectives

  • Students will understand how to add a multiple of ten to a two-digit number.
  • Students will correctly solve addition problems involving multiples of ten.
  • Students will use vertical addition to add numbers accurately.

Introduction

Begin by asking students to think about what happens when they add 10 to a number. Explain that adding a multiple of ten to a two-digit number is simple because it affects only the tens place. Show a simple example on the board: "If I add 10 to 63, what is the sum?" Write on the board: 63+10=73.

Explicit Instruction/Teacher modeling

Explain the steps to add a multiple of ten to a two-digit number using vertical addition:

  1. Write the problem vertically, aligning the tens and ones places.
  2. Add the ones digits.
  3. Add the tens digits.

Use the provided example 63+10 and walk through each step:

  1. Write 63 and 10 vertically.
  2. Add the ones digits: 3+0=3.
  3. Add the tens digits: 6+1=7.
  4. Write the sum: 73.

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Guided Practice

Provide students with the TeachTastic Worksheet Pack for Adding a Multiple of Ten and a Two-Digit Number. Work through the first few problems together as a class. Use manipulatives like base-ten blocks to visually demonstrate the problems if necessary.

Independent Practice

Assign specific worksheets from the TeachTastic Worksheet Pack for students to complete independently. Circulate the room to provide assistance and check for understanding. Examples of problems might include:

  • 34+10=
  • 10+34=
  • 45+20=

Differentiation

Support

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

Extension

  • Provide challenging problems involving adding larger multiples of ten to two-digit numbers.
  • Introduce the concept of adding two-digit numbers without regrouping.
  • Offer additional word problems that incorporate adding multiples of ten to two-digit numbers in real-life scenarios.

Assessment

Use the specific assessment worksheets from the TeachTastic Worksheet Pack to evaluate students' understanding. Ensure the assessment includes a variety of problems adding multiples of ten to two-digit numbers.

Review and closing

Summarize the key points of the lesson. Ask students to share what they learned about adding multiples of ten to two-digit numbers. Address any remaining questions and clarify misconceptions.

Misconceptions

  • Students may think adding a multiple of ten changes both the tens and ones place unpredictably. Address this by using multiple examples and emphasizing the consistent pattern.
  • Students may confuse adding a multiple of ten with adding 1. Clarify this by demonstrating with manipulatives and examples.
  • Students may forget the steps for vertical addition. Reinforce this with repeated practice and examples.
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