# Module 22: 3-Digit Subtraction-Math 2B - Course Guide

## Module Overview:

In this module, students will subtract multiples of 100 mentally, identify the place values of a 3-digit number, and subtract a 3-digit number by breaking it apart into place values. Students will solve word problems using 3-digit subtraction.

## Module Materials:

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

Module Objectives:

Lesson # Lesson Title Objective(s)
1 Subtract Hundreds
1. Subtract multiples of 100 mentally.
2 Break Apart 3-Digit Numbers to Subtract (without Regrouping)
1. Identify the place values of a 3-digit number.
2. Subtract a 3-digit number by breaking it apart into place values.
3 Break Apart 3-Digit Numbers to Subtract (with Regrouping)
1. Identify the ones, tens, and hundreds place of a 3-digit number.
2. Subtract 3-digit numbers by breaking apart the numbers.
4 Subtract 3-Digit Numbers
1. Subtract 3-digit numbers.
5 Problem Solving: 3-Digit Subtraction
1. Solve word problems using 3-digit subtraction.

Module Key Words:

Key Words
thousand chart
mental math
place-value chart
whole
part
difference
regroup
word problem
key words

Module Assignments:

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

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
Subtract Hundreds
1. When do we subtract hundreds in real life?
Break Apart 3-Digit Numbers to Subtract (without Regrouping)
1. How can you subtract 3-digit numbers using place value charts?
Break Apart 3-Digit Numbers to Subtract (with Regrouping)
1. How does place value help us subtract?
Subtract 3-Digit Numbers
1. How do you subtract 3-digit numbers?
Problem Solving: 3-Digit Subtraction
1. When do we subtract 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
Subtract Hundreds Subtract One Hundreds
1. How can you subtract using the hundreds place?
Break Apart 3-Digit Numbers to Subtract (without Regrouping) Break Apart 3-Digit Numbers to Subtract
1. How can you subtract 3-digit numbers using place value charts?
Break Apart 3-Digit Numbers to Subtract (with Regrouping) 3-Digit Subtracting with Regrouping
1. How can you subtract 3-digits with regrouping?
Problem Solving: 3-Digit Subtraction Subtraction Word Problems
1. What are the steps involved in solving subtraction word problems?

## 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