Curated OER
The Difference Bar 2
Pupils use Internet software, The Difference Bar, to work out the difference between two numbers by breaking numbers into parts. Students use mental strategies to work out the difference between any 2 two-digit numbers. Pupils describe...
Curated OER
Math + Fitness = FUN
Students play a game wherein they role 2 dice and calculate either the sum, difference or product of the numbers and the answer is the number of exercises they do. They change stations to do different exercises or skills.
![Inside Mathematics: Incredible Equations [Pdf] Lesson Plan](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Inside Mathematics: Incredible Equations [Pdf] Lesson Plan")
University of Texas
Inside Mathematics: Incredible Equations [Pdf]
This task challenges a student to demonstrate understanding of concepts involved in addition and subtraction.
University of Texas
Inside Mathematics: Pocket Money [Pdf]
This task challenges a student to demonstrate fluency in adding and subtracting whole numbers.
Other
City Journal: Let's Break Up the Big Cities
This lengthy article offers many examples in its claim that smaller municipalities do a better job of governing and providing services than huge megacities.
Books in the Classroom
Carol Hurst's Children's Literature Site: Computation and Picture Books
This sample chapter from Hurst's book Picturing Math is an excellent resource for using picture books and activities for learning computation.
University of Texas
Inside Mathematics: Apple Farm Field Trip [Pdf]
This task challenges a student to use place value knowledge and understanding of operations.
AAA Math
Aaa Math: Estimating a Difference
Students can practice estimating differences in a series of self-check exercises and timed learning games.
AAA Math
Aaa Math: Subtraction
Learners practice subtraction facts using objects. Subtraction facts and an example are included.
AAA Math
Aaa Math: Subtraction Using Estimation
This site explains how to estimate differences by rounding. Games and exercises are provided to practice the skill.
AAA Math
Aaa Math: Front End Estimation: Differences
Students use front-end estimation to solve subtraction problems. Learning exercises and games are provided to practice the skill.
AAA Math
Aaa Math: Inverse Relationship of Subtraction and Addition
Students explore the inverse relationship of addition and subtraction. The resource provides self-check exercises and timed learning games to practice the concept.
AAA Math
Aaa Math: Subtraction of Decimal Tenths
This site describes how to subtract decimals. It provides exercises and games to practice the skill through the tenths place.
CK-12 Foundation
Ck 12: Elem Math: Selecting the Related Subtraction Facts
[Free Registration/Login may be required to access all resource tools.] The video describes the parts of a subtraction problem and explains why subtraction facts are related. The video is followed by a series of practice questions to...
University of Saskatchewan (Canada)
Emr: Exercises in Math Readiness
Practice your mental math skills with this site, where practice problems in addition, subtraction, multiplication, and division abound. Introductory, intermediate, and advanced levels are available. Just type in your answer and you'll...
Antonio Salinas and Maria Jesus Egea
Vedoque: Atento
This interactive game is designed to teach students to identify similarities and differences among objects.
Sophia Learning
Sophia: In Group/out Group: Relationships and Attitudes: Lesson 2
At the end of this tutorial, the learner will understand ways in which group membership affects people's perceptions and actions towards their own and other groups. It is 2 of 3 in the series titled "In-Group/Out-Group: Relationships and...
CK-12 Foundation
Ck 12: Algebra: Simplify Sums or Differences
[Free Registration/Login may be required to access all resource tools.] Simplify sums or differences of single variable expressions by combining like terms.
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.
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Terms Numbers to 1000
[Free Registration/Login may be required to access all resource tools.] The video describes addition and subtraction vocabulary. The video is followed by practice problems utilizing the vocabulary.
Soft Schools
Soft Schools: Integers and Real Numbers Quiz
Students are expected to evaluate the sum, difference, product, quotient, and the absolute value of real numbers and integers. Also, they must know the concepts of positive and negative numbers.
CK-12 Foundation
Ck 12: Arithmetic: Differences of Fractions
[Free Registration/Login may be required to access all resource tools.] Find differences of fractions with different denominators by renaming them with a common denominator.
CK-12 Foundation
Ck 12: Arithmetic: Differences of Mixed Numbers Without Renaming
[Free Registration/Login may be required to access all resource tools.] Find the difference of mixed numbers with common denominators.
CK-12 Foundation
Ck 12: Arithmetic: Differences of Integers Using a Number Line
[Free Registration/Login may be required to access all resource tools.] Use a number line to find differences of integers