Alabama Learning Exchange
Alex: Carlos the Centipede Is Adding Decimals!
In this instructional activity, young scholars will work in collaborative/cooperative groups to understand adding decimals. Students will use decimal grids to represent the sum of decimals. Emphasis is on using place-value, lining up the...
Fact Monster
Fact Monster: Decimals Places
Fact Monster: Decimals is a learning module that focuses on digit placement. It also provides videos on how to add and subtract decimals and how to multiply and divide decimals.
PBS
Pbs: Rounding to the Tenths Place
Only numbers with tenths can get in to the number line party, what's a decimal with hundredths to do? This interactive exercise focuses on using what you know about number lines and rounding to the tenths place and then asks you to think...
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Make a Ten
An interactive simulation that teaches about place value, addition, and subtraction by adding, breaking apart, and combining numbers by making tens and focusing on place value. This simulation can either be downloaded or played online...
University of Texas
Inside Mathematics: Decimals [Pdf]
This task challenges a student to use knowledge of place value system to represent and compare rational numbers.
CK-12 Foundation
Ck 12: Elem Math: Identifying Equivalent Decimals Ending in Zero
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to identify which decimal numbers are equivalent. To do this, they must understand how zero is used as a placeholder....
CK-12 Foundation
Ck 12: Arithmetic: Combinations of Decimal Money Amounts
[Free Registration/Login may be required to access all resource tools.] Write amounts of money as decimals.
CK-12 Foundation
Ck 12: Elem Math: Create the Greatest or Least Decimal Value From Given Numbers
[Free Registration/Login may be required to access all resource tools.] A practice quiz where students must make the greatest or least decimal number with the digits they are given.
Texas Instruments
Texas Instruments: Putting Things in Place
In this activity, students investigate the value of the digits in $8,205.50 and determine the number of thousands, hundreds, tens, ones and even the number of dimes and pennies. The concept is then extended to additional situations. They...
Illustrative Mathematics
Illustrative Mathematics: The Value of Education
The purpose of this task is for students to add, subtract, multiply, and divide decimal numbers in a real-world context. The weekly income earned by each person in the task is the median weekly income for their education level, but they...
CK-12 Foundation
Ck 12: Elem Math: Determining Which Decimal Falls Between Two Given Decimals
[Free Registration/Login may be required to access all resource tools.] For this learning module, students compare decimal numbers to see which one is between the two that they are given. Includes video demonstrating a sample problem...
CK-12 Foundation
Ck 12: Elem Math: Determining the Greatest and Least Value in a Set of Decimals
[Free Registration/Login may be required to access all resource tools.] For this learning module, students compare decimal numbers and identify the greatest or least. Includes video demonstrating a sample problem [0:46] and a set of...
AAA Math
Aaa Math: Decimals Ten Thousandths
This lesson explains how to identify decimals of the ten-thousandths place value. Includes games to practice this skill.
Lesson Tutor
Lesson Tutor: An Introduction to Decimals
A complete introduction to the decimal system is provided here. Topics included in the discussion/lesson plan are: the meaning of and need for decimals, a place value chart, tips to help remember how and when to move the decimal point,...
CK-12 Foundation
Ck 12: Elem Math: Expressing an Equivalent Decimal Ending in Zero to Thousandths
[Free Registration/Login may be required to access all resource tools.] The video describes how to add zeros as place holders at the end of a decimal to make an equivalent decimal out to the thousandths place value in this example.
CK-12 Foundation
Ck 12: Arithmetic: Large Decimal Rounding to Decimal Representations
[Free Registration/Login may be required to access all resource tools.] Round very large numbers to a given place value.
CK-12 Foundation
Ck 12: Arithmetic: Decimal Rounding and Division
[Free Registration/Login may be required to access all resource tools.] Find decimal quotients then round to a given place value.
CK-12 Foundation
Ck 12: Elem Math: Identifying Decimals on a Number Line to Thousandths
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to state the decimals to the thousandths place for given locations on a number line. Includes video demonstrating a...
CK-12 Foundation
Ck 12: Elem Math: Determine Which Set of Decimals Is Correctly Ordered by Value
[Free Registration/Login may be required to access all resource tools.] The video shows how to compare decimals by looking at the value of the digits in each place value to determine the order. The video is followed by a series of...
Quia
Quia: Decimal and Whole Number Jeopardy
You can use this web site to compare and round numbers and to also practice rounding whole numbers and decimals. You can just play by yourself or with another player! See how many points you can get.
Math Is Fun
Math Is Fun: Decimals
A good introduction to decimals, which includes a definition of place value and several examples of decimal numbers. Follow links at the bottom of this page to access decimal worksheets as well as information on rounding numbers, adding...
Illustrative Mathematics
Illustrative Mathematics: Multiplying Decimals by 10
The purpose of this task is to help students understand and explain why multiplying a decimal number by 10 shifts all the digits one place to the left. This understanding builds on work around place-value that students have done with...
Alabama Learning Exchange
Alex: Carlos the Centipede Is Subtracting Decimals!
In this activity, young scholars will work in collaborative/cooperative groups to understand subtracting decimals. Students will use decimal grids to represent the difference of decimals. Emphasis is on using place-value, lining up the...
Khan Academy
Khan Academy: Adding Decimals: Tenths
Add two numbers that are either whole numbers or written to the tenths place value. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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