Curated OER
Mental Math
Students participate in an online computation game. In this computation lesson, students practice simple computations and use an internet site to review addition and subtraction facts.
Virginia Department of Education
Properties
Examine some properties that don't require a general contractor. Scholars first complete a mental math activity that uses the properties of real numbers. A separate activity formalizes these properties.
Curated OER
Blueberries for Sal
Students read the book "Blueberries for Sal" and complete various computation math activities with blueberries. In this computation lesson, students complete number sentences, play guessing games, and solve story problems using...
Curated OER
Beginning Addition
Students examine the concept of addition by adding two one-digit numbers whose sum is less than ten. They count and add goldfish crackers together, chorally repeating each problem.
Scholastic
Adding and Subtracting Ten
Developing fluency with basic addition and subtraction is fundamental to the success of all young mathematicians. This four-day lesson series begins with learners using ten-frames and hundreds charts to recognize patterns when adding and...
Curated OER
Three-Digit Addition and Subtraction With Regrouping
Second graders access prior knowledge of addition and subtraction using two-digit numbers and calculate easily with them. In this three-digit addition instructional activity, 2nd graders learn to add and subtract three-digit numbers with...
Curated OER
Estimate, Solve, and Check
Young scholars estimate, solve, and check a series of addition and subtraction number and word problems. They write their estimates on a recording sheet, compute and write the answer in the next column, and check their answer with a...
Curated OER
All A-buzz About Math
Second graders participate in Math-Eze activities to comprehend word problems. In this word problem lesson plan, 2nd graders recognize why a hexagon is the best shape for a beehive. Students calculate how far bees must travel to find 2...
Curated OER
The Part-Adder 2
Third graders use mental-math strategies to solve two-digit plus two-digit addition problems. They observe and discuss online demonstrations, solve word problems as a class, and independently solve problems and describe their solutions...
Curated OER
Using Math with Sale Papers
Fifth graders estimate their results and then prove through calculations. In this math lesson, 5th graders solve problems using multiplication, division, addition, and subtraction. They also use mental math to solve their problems.
Curated OER
Twenty-Five: A Math Card Game
Students calculate addition and subtraction problems using mental math. They add and subtract cards numbered one through nine until a player gets a sum of twenty-five.
Curated OER
Make it Easier-- Add, then Take
In this math worksheet, students learn a mental math strategy in addition called compensation. When adding a number such as 29, students learn to add 30, then take 1 away. Students solve 25 problems in which they round to the nearest...
Curated OER
Fast Facts
Ever use the inner circle/outer circle method of learning? Placing learners in a stationary inner circle and a rotating outer circle, they roll a die and attempt to be the first to call out an addition or multiplication equation with the...
Curated OER
Addition and Subtraction Pick n Mix 2
Fourth graders practice a wide range of strategies for solving addition and subtraction problems containing decimal fractions. They add and subtract fractions, decimals and integers while generalizing the properties of operations with...
Curated OER
Add It Up In Number Ville! Adding 2-Digit Numbers With and Without Regrouping
Students explore adding 2-digit numbers. In this math lesson, students identify 2-digit numbers and use base ten blocks to practice adding. Students use addition to break a code.
Curated OER
Dance, Dance, Dance
Use dance and song to help your charges in adding whole numbers to 10. In this adding to 10 instructional activity, learners become the manipulatives as you add them.
Curated OER
Addition
Explore the concept of number bonds with your young elementary young scholars. They will become familiar with the number bonds to 10, 20, and 100, and then play games to practice these skills. This is a differentiated lesson which...
Curated OER
Alternative Algorithms
Analyze algorithms for computing with rational numbers and develop fluency in their use with your math class. They work individually to solve the problems on the "Alternative Algorithms" sheet. Then, they analyze the appropriateness of...
Curated OER
Smart Doubling
Second graders use mental math in calculations involving addition and subtraction. They study doubles facts to work out addition problems mentally using part and or whole reasoning.
EngageNY
Overcoming a Second Obstacle in Factoring—What If There Is a Remainder?
Looking for an alternative approach to long division? Show your classes how to use factoring in place of long division. Increase their fluency with factoring at the same time!
Curated OER
The Part-adder 1
Second graders investigate the addition of whole numbers. They mentally perform calculations involving addition and subtraction. They make sensible estimates and check the reasonableness of answers.
Curated OER
Equal Additions
Students explore the relationships between numbers through the use of "equal addition" and "equal subtraction." Through the use of number sense, they are able to computer addition and subtraction problems mentally. Individually,...
Curated OER
Basketball: Number Sense
Third graders explore their addition and subtraction skills. In this number sense lesson plan, 3rd graders analyze different scoring possibilities for a basketball game. This lesson plan incorporates the use a video titled "Blossom and...
Curated OER
Addition And Subtraction of Decimals
Learners participate in a lesson of adding and subtracting decimals. They should review place values with decimals before beginning the lesson. The lesson plan also includes sample problems for the teacher to use in direct instruction....