Module 13: Subtract 2-Digit Numbers-Math 2A - Course Guide

Module Overview:

In this module, students will subtract tens to subtract two-digit numbers, subtract tens and ones using a place value chart, and use the count-back strategy to subtract on a number line. They will use ten frames to subtract a one-digit number from a two-digit number and write and solve a two-digit subtraction sentence from a picture.

Module Materials:

Lesson #	Lesson Title	Material(s)
1	Subtract Tens	stacking blocks crayons or colored pencils pen or pencil
2	Subtract Tens and Ones	stacking blocks crayons or colored pencils pen or pencil
3	Subtract from a Two-Digit Number Using a Number Line	crayons or colored pencils pen or pencil scissors
4	Subtract a One-Digit Number from a Two-Digit Number	crayons or colored pencils pen or pencil
5	Problem-Solving Strategy: Write a Subtraction Sentence	crayons or colored pencils pen or pencil

Module Objectives:

Lesson #	Lesson Title	Objective(s)
1	Subtract Tens	Subtract tens to subtract two-digit numbers
2	Subtract Tens and Ones	Subtract tens and ones using a place value chart
3	Subtract from a Two-Digit Number Using a Number Line	Use the count-back strategy to subtract on a number line
4	Subtract a One-Digit Number from a Two-Digit Number	Use ten frames to subtract a one-digit number from a two-digit number
5	Problem-Solving Strategy: Write a Subtraction Sentence	Write and solve a two-digit subtraction sentence from a picture

Module Key Words:

Key Words
Whole tens Skip count Hundred chart Whole Part Place-value chart Digit Count back Number line Ten frame Subtraction sentence Difference Subtraction strategy

Module Assignments:

Lesson #	Lesson Title	Page #	Assignment Title
1	Subtract Tens	4	Hands-On
2	Subtract Tens and Ones	4	It’s Your Turn!
3	Subtract from a Two-Digit Number Using a Number Line	4	Hands-On
4	Subtract a One-Digit Number from a Two-Digit Number	4	Hands-On
5	Problem-Solving Strategy: Write a Subtraction Sentence	4	Hands-On

Learning Coach Notes:

None

Guiding Questions

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 Tens	How do you use place value to subtract two-digit numbers?
Subtract Tens and Ones	How can you use a place value chart to help you subtract?
Subtract from a Two-Digit Number Using a Number Line	What is the count-back strategy of subtraction?
Subtract a One-Digit Number from a Two-Digit Number	How can you subtract using ten frames?
Problem-Solving Strategy: Write a Subtraction Sentence	How do you write a subtraction sentence?

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