National Security Agency
Fraction Fever
This unit on fractions allows for upper-aged elementary learners to explore ways to find the greatest common factor and least common multiple of two numbers. Ultimately, young mathematicians will be able to identify equivalent fractions,...
Curated OER
What's Math Got To Do With It?
Students explore numbers, computation, ratios, proportions, probabilities, statistics, and money in this six lessons unit. Practical applications in the real world are emphasized through an interactive approach to math in these lessons.
Benjamin Franklin High School
Saxon Math: Algebra 2 (Section 1)
This first of twelve algebra 2 resources provides a broad review of many algebra 1 concepts through a number of separable lessons and labs. Starting with the real number system and its subsystems, the sections quickly but thoroughly...
Goodwill
Gcf Global: Adding and Subtracting Decimals
In this tutorial, students learn how to add and subtract decimals.
Mangahigh
Mangahigh: Number: Add and Subtract Decimals
This site provides students practice with the concept of adding and subtracting decimals. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to practice the skill.
Scholastic
Scholastic: Study Jams! Math: Adding and Subtracting Decimals
Explore how to add and subtract decimals with this interactive lesson. Then test your knowledge with a quick quiz.
CK-12 Foundation
Ck 12: Arithmetic: Mental Math to Add and Subtract Decimals
[Free Registration/Login may be required to access all resource tools.] Find sums and differences of decimals using mental math.
Lesson Tutor
Lesson Tutor: Addition and Subtraction of Decimals
This site is an online lesson plan and practice problems for students learning how to add and subtract two decimal values are provided here. Detailed explanation of both the methods and the practice questions are provided for easy...
Khan Academy
Khan Academy: Adding & Subtracting Decimals Word Problems
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.
CK-12 Foundation
Ck 12: Elem Math: Subtracting Decimals Word Problems
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must solve word problems involving the subtraction of decimals. Includes video demonstrating a sample problem [2:27] and a set of...
CK-12 Foundation
Ck 12: Elem Math: Subtracting Decimals by Inserting Place Holding Zeroes
[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]
CK-12 Foundation
Ck 12: Elem Math: Subtract Decimals From the Thousandths Place to the Tens Place
[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]
E-learning for Kids
E Learning for Kids: Math: Soccer Stadium: Pattern and Function
Carlos wants to learn about calculating with decimals before his soccer practice starts. See if you can help!
CK-12 Foundation
Ck 12: Elem Math: Adding Decimals From the Thousandths Place to the Tens Place
[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...
Khan Academy
Khan Academy: One Step Addition & Subtraction Equations: Fractions & Decimals
Practice solving equations in one step by adding or subtracting a number from both sides. These problems involve decimals and fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Khan Academy
Khan Academy: Adding & Subtracting Rational Numbers
Practice adding and subtracting negative fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Arithmetic: Decimal Addition
[Free Registration/Login may be required to access all resource tools.] Add and subtract decimals with and without rounding
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Money Using Words
[Free Registration/Login may be required to access all resource tools.] The video walks you through an example of pulling out key words to know what operation to use when working with money word problems. The video models converting...
CK-12 Foundation
Ck 12: Arithmetic: Front End Estimation Grade 6
[Free Registration/Login may be required to access all resource tools.] Estimate sums and differences of decimals using front-end estimation.
CK-12 Foundation
Ck 12: Arithmetic: Decimal Addition
[Free Registration/Login may be required to access all resource tools.] Find sums of decimals by adding vertically.
CK-12 Foundation
Ck 12: Elem Math: Predicting the Next Decimal in a Sequence
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are presented with a sequence of decimal numbers and they must identify the pattern rule and predict the next decimal. Includes...
Khan Academy
Khan Academy: Dividing Whole Numbers to Get a Decimal
Divide two whole numbers to get a quotient with a decimal. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Arithmetic: Front End Estimation Grade 8
[Free Registration/Login may be required to access all resource tools.] Use front-end estimation to find decimal sums and differences.
CK-12 Foundation
Ck 12: Arithmetic: Decimal Addition Using Front End Estimation
[Free Registration/Login may be required to access all resource tools.] Use front-end estimation to estimate decimal sums