Module 21: 3-Digit Addition-Math 2B - Course Guide

Module Overview:

In this module, students will add multiples of 100 mentally, identify the ones, tens, and hundreds place of a 3-digit number, and add 3-digit numbers by breaking apart each addend to represent each place value, and solve word problems involving 3-digit addition.

Module Materials:

Lesson # Lesson Title Material(s)
1 Add Hundreds counters (100)
crayons or colored pencils
pen or pencil
2 Break Apart 3-Digit Numbers to Add (without Regrouping) scissors
crayons or colored pencils
pen or pencil
3 Break Apart 3-Digit Numbers to Add (with Regrouping) scissors
crayons or colored pencils
pen or pencil
4 Adding 3-Digit Numbers crayons or colored pencils
pen or pencil
5 Problem Solving: 3-Digit Addition crayons or colored pencils
pen or pencil

Module Objectives:

Lesson # Lesson Title Objective(s)
1 Add Hundreds
  1. Add multiples of 100 mentally.
2 Break Apart 3-Digit Numbers to Add (without Regrouping)
  1. Identify the ones, tens, and hundreds place of a 3-digit number.
  2. Add 3-digit numbers by breaking apart each addend to represent each place value.
3 Break Apart 3-Digit Numbers to Add (with Regrouping)
  1. Identify the ones, tens, and hundreds place of a 3-digit number.
  2. Add 3-digit numbers by breaking apart the addends to represent each place value.
4 Adding 3-Digit Numbers
  1. Add 3-digit numbers.
5 Problem Solving: 3-Digit Addition
  1. Solve word problems involving 3-digit addition.

Module Key Words:

Key Words
thousand chart
place-value chart
addend
sum
word problem
key word

Module Assignments:

Lesson # Lesson Title Page # Assignment Title
1 Add Hundreds 4 Hands-On
2 Break Apart 3-Digit Numbers to Add (without Regrouping) 4 Hands-On
3 Break Apart 3-Digit Numbers to Add (with Regrouping) 4 Hands-On
4 Adding 3-Digit Numbers 4 Hands-On
5 Problem Solving: 3-Digit Addition 4 Hands-On

Learning Coach Notes:

None

Module Guiding Questions:

When a student starts a lesson ask them questions to check for prior knowledge and understanding and to review concepts being taught. At the end of the lesson ask the questions again to see if their answer changes.

Lesson Title Question
Add Hundreds
  1. When do we add hundreds in real life?
Break Apart 3-Digit Numbers to Add (without Regrouping)
  1. How can you add 3-digit numbers using place value charts?
Break Apart 3-Digit Numbers to Add (with Regrouping)
  1. How does place value help us add?
Adding 3-Digit Numbers
  1. How do you add 3-digit numbers?
Problem Solving: 3-Digit Addition
  1. When do we add in real life?

Module Video Questions:

When a student watches a video take time to ask them questions about what they watched. Suggested questions for the videos in this module are listed here. Suggestion: Have the student watch the entire video first all the way through. Then have them watch the video a second time, as they watch it pause the video and ask the questions.

Lesson Title Video Question
Add Hundreds Add Hundreds
  1. How can you add hundreds?
Break Apart 3-Digit Numbers to Add (without Regrouping) Break Apart Strategy Without Regrouping
  1. How can you add 3-digit numbers using place value charts?
Break Apart 3-Digit Numbers to Add (with Regrouping) Break Apart 3-Digit Numbers to Add with Regrouping
  1. How can you add 3-digit numbers with regrouping?

Module Suggested Read Aloud Books:

Take time to read to your student or have them read aloud to you. Read a different book each day. While reading the book point out concepts being taught. You may purchase these books or find them at your local library. Suggested things to discuss while reading the book:

  • What is the main idea?
  • What are three things new you learned?
  • How does this book relate to what you are learning about?

# Book Author Lexile Level

Module Outing:

Take some time to apply what your student is learning to the real world. Suggested outings are below.

# Outing