Worksheet
Curated OER

Addition-Decimals

For Students 4th - 6th Standards
In this addition worksheet, students solve twenty equations associated with addition and decimals. Students show each step of their work as they solve each equation.
Worksheet
Curated OER

Decimals Multiplying

For Teachers 4th - 5th
In this math worksheet, students multiply the values that are using decimals. They pay special attention to the place values for the decimals.
Unknown Type
Khan Academy

Khan Academy: Add 2 Digit Numbers by Making Tens

For Students 2nd Standards
Students will be challenged in their skills to add 2-digit numbers by making tens
Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: Subtracting Whole Numbers and Decimals

For Students 3rd - 8th Standards
If you are looking for a website that explains and defines subtraction with decimals you have arrived at an excellent resource. There are even practice problems at the very end of the lesson.
Lesson Plan
University of Texas

Inside Mathematics: Pocket Money [Pdf]

For Teachers 1st - 3rd Standards
This task challenges a student to demonstrate fluency in adding and subtracting whole numbers.
Handout
Cool Math

Coolmath: Coolmath4kids: Adding and Subtracting Fractions With Whole and Mixed Numbers

For Students 4th - 5th Standards
Short tutorial explaining how to add and subtract fractions, whole numbers, and mixed numbers. Includes example problems to try.
Unit Plan
CK-12 Foundation

Ck 12: Arithmetic: Estimation of Whole Number

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.
Unit Plan
Khan Academy

Khan Academy: Dividing Whole Numbers to Get a Decimal

For Students 5th - 7th Standards
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.
Unit Plan
Khan Academy

Khan Academy: Estimate to Add and Subtract Multi Digit Whole Numbers

For Students 1st - 3rd Standards
Use estimation to find a reasonable solution to multi-digit addition and subtraction problems. Numbers are less than or equal to 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Lesson Plan
Better Lesson

Better Lesson: Adding and Subtracting Fractions

For Teachers 4th Standards
Understanding that when the total number of parts of a whole are the same, fractions can be added.
Unknown Type
Khan Academy

Khan Academy: Add on a Number Line

For Students 3rd
Practice adding numbers like 554 and 237 using a number line. All numbers are less than 1000.
Unit Plan
Khan Academy

Khan Academy: Add Within 1000

For Students 2nd - 4th
Practice adding three-digit numbers. All sums are 1000 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video tutorial, and ask for hints.
Unknown Type
Khan Academy

Khan Academy: Add and Subtract Fractions: Word Problems

For Students 3rd - 5th Standards
In this exercise, students practice adding and subtracting fractions with unlike denominators word problems. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Interactive
Mr. Martini's Classroom

Mr. Martini's Classroom: Addition and Subtraction Comparitive Equations

For Students 3rd - 5th
Students add or subtract two whole numbers and compare the solutions using an inequality symbol. The problem on the flashcard changes color if the correct symbol is chosen.
Interactive
Calculator Soup

Calculator Soup: Mixed Numbers Calculator

For Students 9th - 10th
Do math calculations with mixed numbers (mixed fractions) performing operations on fractions, whole numbers, integers, mixed numbers, mixed fractions, and improper fractions. This calculator can add, subtract, multiply and divide mixed...
Unit Plan
Khan Academy

Khan Academy: Subtraction Within 1000

For Students 3rd - 5th Standards
In this exercise, students practice subtraction within 1000. Students receive immediate feedback and have the opportunity to get hints, watch video tutorials, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2 Fluently add and...
Unit Plan
Khan Academy

Khan Academy: Multi Digit Subtraction

For Students 3rd - 5th Standards
Subtract whole numbers that are less than or equal to 1,000,000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Khan Academy

Khan Academy: Add and Subtract Fractions Word Problems

For Students 4th - 6th Standards
Practice solving fraction addition and subtraction word problems. The fractions in these problems have unlike denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...
Whiteboard
ClassFlow

Class Flow: Adding/ Subtracting Strategies

For Teachers Pre-K - 1st
[Free Registration/Login Required] This flipchart is geared for grade 1. Created in Activprimary, it enforces the variety of adding and subtracting strategies. use as a center or for whole group instruction.
Interactive
Mr. Martini's Classroom

Mr. Martini's Classroom: Inequalities: Addition and Subtraction

For Students 3rd - 5th
Students add or subtract two numbers to solve the inequalities on these interactive flashcards. The problem changes color when the correct symbol is chosen.
Interactive
AAA Math

Aaa Math: Adding Two Digit Numbers

For Students K - 1st Standards
This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...
Unit Plan
AAA Math

Aaa Math: Consumer Math

For Students 1st - 8th Standards
From basics such as adding and subtracting money, converting coins, and making change to more advanced topics such as sales tax and simple interest, this interactive tutorial offers help with consumer math issues.
Lesson Plan
University of Texas

Inside Mathematics: Apple Farm Field Trip [Pdf]

For Teachers 1st - 3rd Standards
This task challenges a student to use place value knowledge and understanding of operations.
Unit Plan
CK-12 Foundation

Ck 12: Arithmetic:

For Students 8th - 9th
[Free Registration/Login may be required to access all resource tools.] Learn how to add integers.