Curated OER
Investigation - Who is Right?
Third graders explore mathematics by solving problems in groups. In this math functions lesson, 3rd graders demonstrate their understanding of addition and subtraction by completing two digit math problems. Students define a list of math...
Curated OER
Summer School Math Worksheets --Addition and Subtraction
In this math worksheet, learners solve 100 addition problems in which 2 digit numbers are added, with and without carrying. Students then solve 100 subtraction problems with 2 digits, with and without regrouping.
Curated OER
Math Webs #1- Addition
In this elementary math worksheet, 3rd graders complete 4 addition math webs by adding the number in the middle of the web to those that are placed around it in a circular graphic organizer. They work with single digit numbers that may...
Curated OER
The Weight of Primates
Second graders practice their problem solving skills. In this addition and subtraction skills lesson, 2nd graders solve word problems that require them to find differences and sums. This lesson features the use of a video titled "Blossom...
Curated OER
Subtracting Greater Numbers
In this subtracting greater numbers worksheet, students, with a partner, problem solve and calculate the answers to six addition equations.
Curated OER
Pattern Puzzles
A short video introduces place value in addition and subtraction. As a class, your learners identify all even numbers up to one hundred and explain the pattern. They use addition strategies to fill in the missing numbers on the number grid.
Curated OER
Chart Trivia
Learners practice addition and subtraction problems and answer questions using greater than and less than. They chart information to create a graph on the computer.
AAA Math
Aaa Math: Adding Three Digit Numbers
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct...
School Express
School Express: Online Addition
Great place to sharpen your addition skills. Start with basic facts and go all the way up to 3 digit addition with regrouping. You select the level of difficulty and the number of problems. You can also check your answer right away.
Lizard Point Quizzes
Lizard Point: Subtraction Practice
At this site from Lizard Point Consulting, you can practice several different levels of difficulty of subtraction problems that use 1-digit numbers all the way up to 3-digit number subtraction problems that require regrouping. You can...
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 1000
Step-by-step tutorial showing how to add 3-digit numbers in place value columns with and without regrouping. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000
Lizard Point Quizzes
Lizard Point: Addition Practice
Practice several different levels of difficulty of addition problems from single digit all the way up to 3 digit with regrouping. You can also choose single digit addition with negative numbers. When you are finished you can print your...