Curated OER
Factoring Difference of Squares
In this factoring difference of squares worksheet, learners solve 18 different problems related to factoring the difference of squares for each. First, they write their parentheses out and find the common factors of the squared number....
EngageNY
The Relationship of Addition and Subtraction
Add an outstanding resource to your repertoire. The first installment of a 36-part module looks at the relationship between addition and subtraction through an activity using tape diagrams. Pupils develop the identities w – x + x = w and...
Mathematics Assessment Project
Generalizing Patterns: The Difference of Two Squares
After completing an assessment task where they express numbers as the difference of squares (i.e., 9 = 5^2 – 4^2), class members note any patterns that they see in the problems.
EngageNY
Substituting to Evaluate Addition and Subtraction Expressions
Substitute this resource for what you used to use. Learners identify patterns in data tables and write addition and subtraction expressions to represent relationships. Substitution allows them to solve problems in context in the 20th...
Illustrative Mathematics
Kiri's Mathematics Match Game
Learning math is so much more fun when it involves playing games. Following the rules of the classic game Memory, young mathematicians flip over two cards at a time as they look for numbers whose sum or difference is equal to the value...
EngageNY
Writing and Evaluating Expressions—Addition and Subtraction
Let Y represent Yes to using an excellent resource. Pupils first learn to define variables using a complete description in the 19th part in a series of 36. They write expressions involving addition and subtraction in real-world contexts...
West Contra Costa Unified School District
Lowest Common Multiple through the Grades
The LCM will be your new BFF. Learners review least common multiple and least common denominator applications, mostly on fractions, from middle school. Scholars then see how the LCM can be applied to various types of problems from...
Illustrative Mathematics
The Napping House
How many people and animals can cram into a single bed? Find out with this cross-curricular math and language arts lesson. Following along with a reading of the children's book The Napping House by Audrey Wood, young mathematicians add...
CK-12 Foundation
Finding the nth Term Given the Common Ratio and the First Term: Dominoes
Topple misunderstandings of geometric sequences. Using a context of creating ever-increasing sizes of dominoes, pupils develop a geometric sequence. The scenario provides the size of the first domino and the common ratio between...
Curated OER
Addition and Subtraction Fact Family Lesson Plans
Get more bang for your buck by teaching addition and subtraction fact family lesson plans.
Scholastic
Study Jams! Addition & Subtraction of Decimals
So current with preteens is the topic of downloading tunes into their computers! In a relatable lesson, viewers are taught to figure out if Zoe can afford to purchase two songs if she has $3.00 left to her credit. Mia talks them through...
Curated OER
Common Subtraction 2 Digits Sheet 1
In this subtraction practice worksheet, students solve 9 problems that require them to subtract 2-digit numbers from 2-digit numbers.
Common Core, Inc.
Multi-Digit Whole Number Subtraction
A thorough exploration into subtracting multi-digit numbers, this series of lessons is an excellent way to guide learners of any skill level. With a step-by-step lesson plan and straightforward assessment tools, kids are sure to...
Curriculum Corner
7th Grade Math Common Core Checklist
With so many math standards to fit into a school year, it can be difficult keeping track of what you have and have not covered. This collection of Common Core checklists allows you to maintain a running record of when each standard was...
EngageNY
Addition and Subtraction Formulas 1
Show budding mathematicans how to find the sine of pi over 12. The third lesson in a series of 16 introduces the addition and subtraction formulas for trigonometric functions. Class members derive the formulas using the distance formula...
Bridges In Mathematics
Kindergarten Assessments and Scoring Checklists, Common Core State Standards
Whether or not your school has adopted Common Core standards, this resource provides great tools for assessing kindergartners' key numeracy and computation skills.
CK-12 Foundation
Explicit Formulas: Tiles for Writing nth Term in a Sequence
Build an explicit formula using tiles. Pupils develop a tile representation of a term within a sequence given figures of previous terms. Using the diagrams, learners develop the explicit formula by recognizing the common difference and...
Math Drills
Subtract Mixed Numbers w/Like Denominators (H)
Looking to give your upper elementary schoolers some quick practice subtracting mixed numbers? Give each learner a copy of this sheet, and set the timer! There are 18 problems shown, and the second page contains the answers.
Math Learning Center
Grade 1 Assessments and Scoring Checklists, Common Core State Standards
Track your learners' progress in addition, subtraction, counting, and interpreting word problems with a series of assessments. The packet includes scoresheets to note learners' strengths and weaknesses as you address each skill.
Curated OER
Fraction XII: Subtracting Unlike Denominators
This fractions PowerPoint defines and gives examples of multiples and least common multiple, then models how to list multiples and circle the least common multiple. Each step to use in subtracting fractions with unlike denominators is...
Curated OER
Allergies Versus the Common Cold
Activities to educate your class on the causes and symptoms of allergies.
Curated OER
Addition and Subtraction of Rational Expressions
In this rational expressions worksheet, 9th graders solve and complete 15 different problems that include adding and subtracting rational expressions. First, they define Least Common Multiple to get a common denominator in an equation....
Curated OER
Subtract Mixed Numbers With Like Denominators (E)
In this fractions subtraction worksheet, students solve 14 problems in which mixed numbers with like denominators are subtracted.
Curated OER
Subtract Mixed Numbers With Like Denominators (C)
In this fractions instructional activity, students solve 14 problems in which mixed numbers with like denominators are subtracted. An example is provided.