Primary Resources
Primary Resources: Addition and Subtraction Higher Numbers
An extensive selection of teacher resources to aide in teaching and reviewing addition and subtraction of two and three digit numbers, inverse operations, counting on, and other mental strategies for addition and subtraction. Resources...
E-learning for Kids
E Learning for Kids: Math: Husky Sled: Subtraction Strategies
Take a ride on the sled with Alexander and Keiko!
US Department of Education
Helping Your Child Learn Math: Math for the Fun of It
This compilation of math activities engages parents and children in the use of math whenever they are at home. Packed with concise, high interest activities, related illustrations, detailed "parent pointers," and easy to following...
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: The Meaning of Subtraction, and Mental Calculation
This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.
University of Regina (Canada)
University of Regina: Math Central: Lesson Plan: Money, Money, Money
It all about money! Explore the concept of money in this real-world, unit plan. A collection of six lessons where students practice skills such as coin identification, mental math, menu math, making change, math operations with coins,...
Teaching Treasures Publications
Teaching Treasures: Year Two Timed Mental Math (Page 3)
Increase your addition and subtraction speed using this timed interactive worksheet. With just ten problems and five minutes, this worksheet is suitable for practice or as an assessment tool. Check your answers immediately.
Other
Answermath.com: Resta
An online subtraction game which offers practice in mental math and times practice. When you submit the wrong answer, it provides the correct one. Students and teachers can choose how many places to subtract. In Spanish, with links to...
Teaching Treasures Publications
Teaching Treasures: Year Six Timed Mental Math (Page 2)
Improve your computations skills in all four operations with this timed interactive worksheet. Solve ten problems in five minutes or less. Problems are presented in horizontal format and answers can be checked immediately. This worksheet...
Teaching Treasures Publications
Teaching Treasures: Year One Timed Mental Math (Page 3)
Try to solve ten addition or subtraction problems in less than five minutes using this interactive worksheet. Immediate feedback is given. A suitable tool for use as a quick assessment.
Teaching Treasures Publications
Teaching Treasures: Year One Timed Mental Math (Page 2)
Learners are challenged to solve ten addition or subtraction problems in less than five minutes using this interactive worksheet. Immediate feedback is given.
CK-12 Foundation
Ck 12: Mental Math for Addition and Subtraction Equations
[Free Registration/Login Required] Students will use a real world example to solve single variable equations mentally. Click challenge me to answer a practice question and click learn more to watch a video.
Teaching Treasures Publications
Teaching Treasures: Year One Timed Mental Math (Page1)
Test your computation skills using this timed interactive worksheet. Five minutes is the time limit. Answers can be checked when finished. This short activity would be suitable for a quick assessment.
National Council of Teachers of Mathematics
The Math Forum: K 12 Math Problems, Puzzles, Tips & Tricks
At this site us these tips & tricks to help students become better mental mathematicians.
Teachnology
Teachnology: Arithmetic Theme
Arithmetic Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition, subtraction, multiplication and division.
Teachnology
Teachnology: Arithmetic Theme
Arithmetic Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition, subtraction, multiplication and division.
Other
Ministerio De Educacion: Suma Y Resta
Practice your mental math by finding two numbers knowing their sum and difference.
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: Resta Y Producto
Practice your mental math by finding two numbers knowing their difference and product.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Figuras Magicas
Interactive fun activities that could be used in the classroom to practice mental math skills.
Educaplus (Jesús Peñas Cano)
Educaplus: Ecuaciones Visuales
In this activity you can practice mental math by answering each question with the help of the given pictures. You can choose from three different levels.
Educaplus (Jesús Peñas Cano)
Educaplus: Puzzle Algebraico
In this activity you can practice mental math by finding the value of each of the objects with the help of the given pictures.
E-learning for Kids
E Learning for Kids: Math: Llama Farm: Mixed Operations
On this interactive site students learn to write a remainder as a decimal and solve division problems using the appropriate mental, written or calculator strategy.
University of Waterloo (Canada)
Math Frog: Arithmagic
Practice operations of mental math while the program timer runs.
E-learning for Kids
E Learning for Kids: Math: Bbq Party: Counting Forwards & Backwards
Explore counting and number patterns with Lily as she throws a BBQ party.
PBS
Pbs Kids Afterschool Adventure!: Operation: Adding Up, Taking Away Activity Plan
In this week's Afterschool Adventure, children will practice and explore strategies for solving addition and subtraction problems, such as using counters and rulers, performing mental math, and drawing pictures. As children encounter...