Curated OER
Developing Strategies for Addition and Subtraction
Primary graders develop strategies to assist them with addition and subtraction. They discover number combinations and numerical facts which enable them to add and subtract more effectively. Young scholars use these techniques to...
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Subtraction with Regrouping Lesson Plan
Learners explore regrouping while subtracting. In this subtraction lesson, pupils manipulate base 10 blocks to demonstrate regrouping. Multiple resources are provided.
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Twelve Days of Christmas--Prediction, Estimation, Addition, Table and Chart
Scholars explore graphing. They will listen to and sing "The Twelve Days of Christmas" and estimate how many gifts were mentioned in the song. Then complete a data chart representing each gift given in the song. They also construct...
Curated OER
Alexander Used to Be Rich
Reading Alexander, Who Used to Be Rich Last Sunday, launches this lesson appropriate for children who recognize coins and have been introduced to coin values. Using addition and subtraction skills, the class tracks Alexander’s spending...
Illustrative Mathematics
Sum and Difference Angle Formulas
Need practice deriving trigonometric angle formulas? With this worksheet, pupils derive the sum and difference formulas for cosine and tangent and the difference formula for sine. Scholars use the sine sum formula and other known...
Laboratory for Atmospheric and Space Physics
Jupiter’s Relative Size
How do you properly illustrate the extreme size difference between two planets—Earth and Jupiter? With the help of jellybeans, of course! Create a scale model of Jupiter's mass compared to Earth using a fishbowl, 1,400 beans, and a dixie...
Curated OER
Relate Counting to Addition and Subtraction
Find 10 simple word problems that require addition and subtraction skills. Although these offer clear math procedure, the grammar isn't perfect. The highest number your learners encounter here is 40, and each question has room for...
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Using Addition To Subtract
In this addition and subtraction activity, 2nd graders solve 9 subtraction problems and find the missing digit in 9 addition problems.
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Fact Families
In this mathematics worksheet, 1st graders create a fact family that uses specific numbers given. Then they draw eight circles, add five more, and write the fact out in a problem.
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Addition: Number Bonds to 40
In this addition and subtraction worksheet, learners use their problem solving skills to solve 41 problems as they fill in the missing numbers in each of the problems.
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Easier Way to Subtract
In this subtraction review worksheet, students read about the Tic Tac Toe method for subtraction and then use the method to solve some problems.
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Names for Numbers
In this mathematics worksheet, 1st graders identify various numbers and use counters to illustrate each fact given. Then they complete the math sentences correctly.
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Relate Addition and Subtraction Enrichment 14.7
In this addition and subtraction worksheet, students solve 3 problems in which lines are drawn to match the pictures to the number sentences in the same fact family. Students solve the problems.
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Multiplication Table: Facts From 1-12
In this multiplication worksheet, students complete a multiplication table with facts from 1- 12. There are some numbers provided as hints.
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Fill- In Multiplication Grid Problems 30% Open
In this multiplication worksheet, students fill in a multiplication chart with products from the factors 1 to 12. The chart is 70% filled in and students supply the remaining products.
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Far Out Fact Families
Second graders explore related multiplication and division facts. They study the inverse relationship of multiplication and division and engage in a group discussion about families. They complete a web-based lesson which is imbedded in...
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Fraction Facts
Middle schoolers explore the concept of fractions. In this fractions lesson, students perform basic operations such as addition and subtraction with fractions. Middle schoolers play a game on the computer called 'Fraction Four' that...
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Family at Home
Learners fold paper to form a house, then use three numbers to make fact families for their houses. They write a family of multiplication and division facts on a piece of paper cut in the shape of a house.
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Triangle Town
Second graders create a fact family town to develop the understanding of numbers related in fact families. They learn each family has a big number and two baby numbers. They make triangle shaped houses for their facts.
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Subtraction With Negative Results
In this subtraction activity, students solve 80 problems in which a single digit number is subtracted from another number that is smaller. The answers will be negative numbers.
Pennsylvania Department of Education
Practice Makes Perfect
Students study fact families. In this math lesson, students use fact families to play a game of concentration. Students identify subtraction facts they need to learn.
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Sum and Difference angle formulas
Learners use the sum angle formula for sine to derive the sum and difference formulas for cosine and tangent. The level of difficulty is quite high. Learners must be familiar with trigonometric identities as well as the characteristics...
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Fact vs. Opinion: Theory, Hypothesis, and Bias
Emphasize the differences between a theory and a hypothesis to teach your class how to avoid scientific bias.
Curated OER
Inverse Relationship Between Addition and subtraction
First graders review number facts to illustrate the relationship between addition and subtraction. In this inverse relationship lesson, 1st graders write an addition sentence and then invert the numbers to show the subtraction fact.