Chapter 3: Decimals
The Lessons in Chapter 3
Place Value with Decimals
Comparing Decimals
Add and Subtract Decimals
Rounding Decimals
Review: Multiply and Divide Decimals Mentally
Review: Multiply Decimals by Decimals
Review: Long Division with Decimals
Problem Solving with Decimals
Fractions and Decimals
Multiply and Divide by Powers of Ten
Review: Divide Decimals by Decimals
Divide Decimals by Decimals 2
Convert Customary Measuring Units
Convert Metric Measuring Units
Convert Between Customary and Metric
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DECIMAL PLACE VALUE
Naming Decimals
Use this online quiz to improve your decimal skills.
Expanded Form
Practice decimal addition in this 10-question online quiz.
Write Decimals as Fractions
Practice rewriting decimals as fractions. These problems use decimals with up to four decimal places.
Number Line Game
Slide the circles onto the number line from lowest to greatest. Complete all five rounds as quickly as you can. (Choose “fractions and decimals”.)
Balloon Pop Decimals
Pop the balloons in order: from the smallest value to the largest value.
Ordering Game
Get good at placing decimal numbers in order! This exercise includes negatives, decimals, fractions, and reverse order. Choose “Tricky decimals”.
Decimal Darts
Try to pop balloons with darts by estimating the balloons’ height. Requires Shockwave.
Decimal Challenge
Try to guess a decimal number between 0 and 10. After each guess you get feedback about whether your guess was too high or too low.
Decimals in Space
An Asteroids-style game where you first answer a question about the smallest decimal and then get to shoot asteroids, earning points based on the numbers on them.
Rounding Quiz
Practice rounding decimals in this 10-question online quiz.
ADD AND SUBTRACT DECIMALS
Add and Subtract Decimals: Mixed Problems
Practice mental and written methods for adding and subtracting decimal numbers.
Adding and Subtracting Decimals Quiz
Practice addition and subtraction of decimals with regrouping with this interactive online quiz.
MULTIPLY AND DIVIDE DECIMALS
Multiply Decimals by Whole Numbers - Mental Math
Practice mental and written methods for multiplying and dividing decimal numbers.
Decimal Times - Multiplication
Practice multiplying 3-digit decimal numbers in this online exercise.
Decimal Times - Division
Practice dividing decimals by integers in this interactive online activity.
Long Division to Decimal Places
Read an illustrated lesson about long division to decimal places. Then, scroll down for interactive practice questions.
Decimal Times
Practice mental and written methods for multiplying and dividing decimal numbers in this interactive activity.
Dividing Decimals Quiz
Practice decimal division with this interactive multiple-choice quiz.
Dividing Decimals
A short, illustrated lesson about decimal division. At the bottom of the page, you can find a series of practice questions.
Quiz: Multiply & Divide Decimals by Powers of Ten
Practice decimal arithmetic with this 10-question interactive quiz.
Multiplying and Dividing by Powers of Ten
Practice multiplication and division by powers of ten with this interactive online exercise.
WORD PROBLEMS
Rags to Riches: Decimal Word Problems
Practice decimal arithmetic with these multiple-choice word problems.
More Decimal Word Problems
This page includes illustrated examples of how to solve decimal word problems, as well as problems to solve.
FRACTIONS AND DECIMALS
Match Fractions, Decimals, and Percentages
Practice matching fractions, decimals, and percentages with this interactive activity. Choose level four.
Fraction Decimal Scale
Explore the relationship between fractions and decimals with this interactive activity.
Fraction Snake - Ordering Game
Arrange the numbers on the snake in order from the largest on the head to the smallest at the tail.
Recurring Decimals Guessing Game
Find pairs of whole numbers such that the first divided by the second results in the given recurring decimal number.
Order Fractions Quiz
Practice ordering fractions in this 10-question online quiz. Use your knowledge of decimals!
Fractions - Decimals calculator
Convert fractions to decimals, or decimals to fractions, including repeating (recurring) decimals to any number of decimal places, which normal calculators do not do.
MEASUREMENT UNITS
Convert Customary Units Test
Practice customary unit conversions with this interactive online test.
Inequalities - Metric Units
Check that you know what inequality signs mean and how they are used to compare two quantities in this interactive exercise.
Metric and Customary Units - Approximations
Practice converting between metric and customary units of measurement in this online quiz.
Metric Conversion Trick
This video explains the basics of the metric system and shows how to convert one unit to another using a prefix number line and moving the decimal point.
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