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Unit Plan
CK-12 Foundation

Ck 12: Arithmetic: Mental Math to Add and Subtract Decimals

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Find sums and differences of decimals using mental math.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding Decimals Word Problems

For Students 3rd - 5th
[Free Registration/Login may be required to access all resource tools.] The resource starts with a quick video modeling the process of adding decimals in word problems. In addition to the video are practice problems with real-world...
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding Decimals From the Thousandths Place to the Tens Place

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] This mathematics resource is a video demonstrating addition with decimals to the thousandths place, followed by practice problems adding numbers with digits in the...
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Interactive
Visual Fractions

Visual Fractions: Platform Scale Addition

For Students 3rd - 8th
Weigh five little creatures on a metric scale, and add to find their total mass to the hundredths place as each one joins the group. A timer calculates your speed of computation.
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Unknown Type
Shmoop University

Shmoop: Fractions & Decimals: Adding & Subtracting Decimals

For Students 9th - 10th Standards
The mathematics notes investigate how to add and subtract decimals. Examples and practice problems with solutions are included.
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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Add and Subtract Decimals

For Students 4th - 6th Standards
Find a quick, concise explanation of how to add and subtract decimals. Step by step examples are included to help you understand how to line up the decimals points and then find the sum or difference.
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Whiteboard
ClassFlow

Class Flow: Decimals Addition Subtraction

For Teachers 4th - 6th Standards
[Free Registration/Login Required] In this lesson students will add decimals to the tenths and hundredths place after first learning to line up the decimal. There is also an Activote session integrated into this flipchart.
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Interactive
University of Waterloo (Canada)

Mathfrog: Decimal Mania Add or Subtract the Decimals

For Students 3rd - 5th Standards
Add or subtract by entering one digit in each box.
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Unit Plan
Khan Academy

Khan Academy: Adding & Subtracting Decimals Word Problems

For Students 5th - 7th
Practice solving word problems by adding or subtracting decimal numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unknown Type
Khan Academy

Khan Academy: Adding Decimals: Hundredths

For Students 5th
Add two numbers that are written to the ones, tenths, or hundredths place.
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Unit Plan
PBS

Pbs: Logical Leaps: Adding Fractions and Decimals From 0 to 1 on the Vertical Number Line

For Students 6th - 8th
In this interactive, use logic to solve riddles involving flea circus high jumps. Then, add two consecutive jumps and place them on a vertical number line. This often requires you to find equivalent fractions with common denominators....
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Activity
Homeschool Math

Homeschool Math: Adding and Subtracting Decimals (One Decimal Digit)

For Students 4th - 5th
This is a complete lesson with instruction and a variety of exercises, teaching how to add and subtract decimals with one decimal digit (tenths).
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Unknown Type
Khan Academy

Khan Academy: Adding Decimals #6

For Students 4th - 5th Standards
Practice adding whole numbers and decimals up to the hundredths place. Includes hints.
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Unknown Type
Khan Academy

Khan Academy: Adding Decimals #5

For Students 4th - 5th Standards
Practice adding whole numbers and decimals up to the hundredths place. Includes hints.
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Unknown Type
Khan Academy

Khan Academy: Adding Decimals

For Students 5th
Start with simple problems like 0.2 + 0.4 and build to more complex problems like 10.3 + 36.75.
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Activity
Homeschool Math

Homeschool Math: Add and Subtract Decimals: Practice Problems

For Students 4th - 5th
This lesson contains a variety of exercises for adding and subtracting decimals with up to two decimal digits,
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Activity
Homeschool Math

Homeschool Math: Adding and Subtracting Decimals With Two Decimal Digits

For Students 4th - 5th
This is a complete lesson with instruction, word problems, and exercises about adding and subtracting decimals with two decimal digits (hundredths).
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Website
PBS

Pbs Learning Media: How Many Rails for the Detour?

For Students 6th - 8th
The CyberSquad adds decimals to figure out how many rails they need to build a detour that will help them go around a mountain in this Cyberchase video segment.
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Interactive
Arcademics

Arcademics: Hungry Puppies

For Students 4th - 6th Standards
Have your puppy choose the two decimals that will make the given sum when added together.
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Website
Ducksters

Ducksters: Kids Math: Adding and Subtracting Decimals

For Students 3rd - 8th Standards
Kids learn how to add and subtract decimals by lining up the decimal point on this website. The site has example math problems.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Subtracting Decimals by Inserting Place Holding Zeroes

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] A video and practice questions on how to subtract decimal numbers using place-holding zeroes. [1:48]
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Subtract Decimals From the Thousandths Place to the Tens Place

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] A video and practice questions on how to subtract decimal numbers from the tens place to the thousandths decimal place. [0:47]
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Converting Integer and Fraction Sums Into Decimals

For Students 4th - 5th
[Free Registration/Login may be required to access all resource tools.] For this learning module, students must convert the sum of integers and fractions into a decimal total. Includes video demonstrating a sample problem [1:00] and a...
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Whiteboard
ClassFlow

Class Flow: Decimals Cents

For Teachers 4th - 6th
[Free Registration/Login Required] During this lesson students will learn the relationship between decimals and money. They will use banking terminology to add and subtract dollar and cent amounts in a checkbook-like situation.

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