NumberNut
Number Nut: Let Math Begin With Addition
This introductory addition lesson, explores the relationship between adding and number patterns using a number pyramid designed by mathematician Carl Gauss. A short lesson with interesting facts and links to related games for practicing...
NumberNut
Number Nut: Addition: Carrying
This lesson provides the rules for carrying values in addition by giving examples and the steps involved in the process.
NumberNut
Number Nut: Addition: 2 Digit Numbers
Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.
NumberNut
Number Nut: More Than Two Addends
Develop strategies for adding more than two addends with this quick addition lesson. Examine how grouping numbers can help make adding multiple numbers easier. Then, practice your new skills using the related interactive games that are...
ICT Games
Ict Games: Bridge Doubles
You get to practice doubling numbers up to 20. When you are correct, your car is able to cross the water safely. If you make a mistake, your car goes for a swim!
Mr. Martini's Classroom
Mr. Martini's Classroom: Adding 4 Numbers
Students practice adding four one-digit numbers. They can select the largest addend for each problem.
Mr. Martini's Classroom
Mr. Martini's Classroom: Adding 2 Digit Numbers Showing the 1 Carry
Students add two-digit numbers with these interactive flashcards. The resource demonstrates how to carry a "1" in the tens or hundreds column.
Mr. Martini's Classroom
Mr. Martini's Classroom: Addition Flashcards
Students can practice addition facts with these interactive flashcards. The problem changes color when the correct sum is typed.
Mr. Martini's Classroom
Mr. Martini's Classroom: Addition Cards, Fill in the Blank
Students fill in the blank with the correct number to solve the addition problems. The problem changes color when the correct number is typed.
Mr. Martini's Classroom
Mr. Martini's Classroom: Adding Decimals to the Tenths Place
Students add decimals on these interactive flashcards. The problem changes color when the correct sum is typed.
Other
Personal Site: Adding Vectors
This personal site provides a diagram and description of the addition of vectors. The triangle law of addition and the parallelogram law are given.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: The Product Is [Pdf]
Given some clues the students are to find the possible solutions.
Houghton Mifflin Harcourt
Houghton Mifflin Harcourt: Saxon Activity Center: Graphing Calculator Activity: Average [Pdf]
A concise graphing calculator lesson on calculating average. Detailed examples, demonstrations of calculator functions, and practice problems included. Acrobat Reader required.
Math Slice
Basic Operations: Addition
This resource covers basic addition where students can choose a range of numbers including negatives or even decimals. After selecting parameters students are timed completing ten problems with instant feedback and an opportunity to...
Math Slice
Math Slice Fast Sum
This resource is a set of ten timed practice problems where parameters are selected for the sum and the range of addends. The sum and one addend are given and students determine the missing number to create the sum. Instant feedback and...
ClassFlow
Class Flow: Perimeter With Division
[Free Registration/Login Required] This flipchart is an excellent introduction to Perimeter and an addition to division review integrated with the concept of perimeter. This flipchart features a great website link for additional...
ClassFlow
Class Flow: Zoo Addition
[Free Registration/Login Required] This flipchart concentrates on addition but uses a wide variety of teaching strategies to help students understand addition. The clever theme keeps their attention and problems are stated in several...
ClassFlow
Class Flow: Close to 100
[Free Registration/Login Required] This math game uses numeral cards and players try to make sums as close to 100 as possible. This flipchart introduces the game and can be used for the teacher to play against the class using a set of...
Mr. Martini's Classroom
Mr. Martini's Classroom: Big Number Flashcards: Addition Through 99
These interactive flashcards help students add two-digit numbers through 99. The problem changes color with the correct answer.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Distributive Property Illustrated
This is part of a math forum at Drexel University. A student gets frustrated when asked to solve a problem using the distributive property. Never fear. Dr. Math to the rescue! Illustrations and detailed examples help provide...
Other
University of Northern Iowa: Summation Notation
This site from the University of Northern Iowa explains the sigma notation and gives an example.
Mr. Martini's Classroom
Mr. Martini's Classroom: Equivalent Addition Problems: Fill in the Blank
Students choose the correct number to balance the addition equation and create an equivalent sum.
Purple Math
Purplemath: Special Factoring: Differences of Squares
Demonstrates how to use the formula for finding the differences of squares, and warns against trying to factor a sum of squares.
Disfruta Las Matematicas
Disfruta Las Matematicas: Hojas De Ejercicios De Matematicas Preescolares
This site contains many worksheets for preschool students. You can see them on the screen and print them with or without the answers.