How Do I Subtract Using Decimals?
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Subject Area: Mathematics (B.E.S.T.) | Grade Level: 5
Lesson Length: 30 minutes
Keywords/Tags: decimals, subtraction, decimal subtraction, reasoning, strategies
Lesson Description: In this lesson, students will subtract decimals to hundredths using a variety of strategies. Students will also explain the reasoning used to subtract decimals. Students will utilize the following vocabulary words throughout: decimals, difference, subtraction, equation, and expression.

  • MA.5.NSO.2.3 Add and subtract multi-digit numbers with decimals to the thousandths, including using a standard algorithm with procedural fluency.
  • Other 5.NR.4.4
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Video : Subtracting Decimals | 5th Grade Math
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Description: Learn how to Subtract Decimals with Mr. J. Whether you're just starting out, need a quick refresher, or here to master your math skills, this is the place for everything 5th grade math!
Quiz : Quiz: Subtracting Decimals
Instructions: Please complete this quiz by choosing the correct answer for each question. You can take this quiz as many times needed.
Question #1

It rains 0.6 inch on Tuesday and 0.21 inch on Thursday. How much more rain falls on Tuesday than Thursday?

Question #2

Three lemons weigh 3.17 ounces, 3.71 ounces, and 1.74 ounces. What is the difference between the weights of the heaviest lemon and the lightest lemon?

Question #3
What is the value of the expression 12.4 - 5.37?
Question #4
True or False: 34.56 - 18.79 = n is the same as 18.79 + n = 34.56
Question #5
Sabine is looking at cable plans. A major company offers a monthly plan for $69.99. The company is having a sale and offering a discount of $9.99 off the monthly plan. Sabine says that the new cost is 59.98. Is she correct? Explain.
Question #6

Solve 7.5 - 1.2

Question #7
Solve the following equation: 26.8 - 9.81
Question #8
True or False: 5.13 - 0.6 = 5.07
Question #9
Find the difference between 23.5 and 4.38.
Question #10

What is the value of the expression 32.34 - 10.3.

Description: Please answer all the questions. Use the information that you have learned throughout the lesson to solve the problems.
Resources : Extra Resources Using Decimals
Instructions: Please see additional external resources below. Feel free visit each link to learn more about this lesson.
Online Math Learning
Using a Number Line to Subtract Decimals
Cue Math
Use interactive tutorials to add and subtract decimals.
Subtracting Decimals: Keeping it Simple
This math video tutorial provides a basic introduction into subtracting decimals. it explains how to subtract two decimal numbers with regrouping.
Subtracting Decimals: I-Ready Practice
Log into your I-Ready platform and use this interactive practice. You will use models and strategies based on place value to subtract decimals. You will also subtract decimals to hundredths.