# Module 14: Subtract Two-Digit Numbers- Math 2A - Course Guide

## Module Overview:

In this module, students will use a place-value chart to regroup, subtract a one-digit number from a two-digit number, and rewrite numbers to subtract. They will subtract two-digit numbers without regrouping, subtract two-digit numbers with regrouping, and use a subtraction strategy to add using an input/output box.

## Module Materials:

Lesson # Lesson Title Material(s)
1 Subtract a One-Digit Number from a Two-Digit Number with Regrouping stacking blocks
crayons or colored pencils
pen or pencil
2 Rewrite Two-Digit Subtraction crayons or colored pencils
pen or pencil
scissors
3 Two-Digit Subtraction Without Regrouping scissors
crayons or colored pencils
pen or pencil
4 Two-Digit Subtraction with Regrouping crayons or colored pencils
pen or pencil
5 Input/Output Tables (Subtract) crayons or colored pencils
pen or pencil
scissors

Module Objectives:

Lesson # Lesson Title Objective(s)
1 Subtract a One-Digit Number from a Two-Digit Number with Regrouping
1. Use a place-value chart to regroup
2. Subtract a one-digit number from a two-digit number
2 Rewrite Two-Digit Subtraction
1. Rewrite numbers to subtract
3 Two-Digit Subtraction Without Regrouping
1. Subtract two-digit numbers without regrouping
4 Two-Digit Subtraction with Regrouping
1. Subtract two-digit numbers with regrouping
5 Input/Output Tables (Subtract)
1. Use a subtraction strategy to add using an input/output box

Module Key Words:

Key Words
Regrouping
Place value
Whole
Part
Input/output table
Rule

Module Assignments:

Lesson # Lesson Title Page # Assignment Title
1 Subtract a One-Digit Number from a Two-Digit Number with Regrouping 4 Hands-On
2 Rewrite Two-Digit Subtraction 4 Hands-On
3 Two-Digit Subtraction Without Regrouping 4 Hands-On
4 Two-Digit Subtraction with Regrouping 4 Hands-On
5 Input/Output Tables (Subtract) 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 a One-Digit Number from a Two-Digit Number with Regrouping
1. How can we regroup to subtract?
Rewrite Two-Digit Subtraction
1. How can we subtract multiple two-digit numbers?
Two-Digit Subtraction Without Regrouping
1. How can we quickly subtract larger two-digit numbers?
Two-Digit Subtraction with Regrouping
1. When do we need to regroup to subtract?
Input/Output Tables (Subtract)
1. When do we use input/output tables?

## 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

## 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