Curated OER
Mental Math Counts
Learners use mental math. They describe reasonable and unreasonable sums and differences. Students use mental math to find the sums and differences of addition and subtraction facts at random. They solve addition and subtraction facts...
Alabama Learning Exchange
Estimation Station: Why Estimating is Better than Guessing
Youngsters discover the difference between estimating and guessing. They estimate how many items are contained in a jar as they read a story. After the story, pupils discover the differences between estimating and guessing and create a...
Curated OER
Math Speed Tests Book 1
In this timed math drills activity, students complete two 50 problem tests with mixed addition and subtraction facts to 20. They are presented in horizontal form and may be timed.
Curated OER
Building Word Problems
Sixth graders study addition and subtraction facts. In equal groups, they play a race game to correctly solve addition and subtraction problems. Using a PowerPoint presentation, the teacher demonstrates how to write word problems and...
T. Smith Publishing
Halloween Add or Subtract Worksheet 1
Twenty-eight subtraction problems are presented using single- or double-digits. Because of a fuzzy bat at the top of the page, this is a Halloween-themed worksheet. Use it as a homework assignment or assessment of subtraction skills.
Curated OER
Number Tick Tack Toe
Students practice basic addition and subtraction facts to twelve. They use high level thinking skills to win at the game of tick tack toe. Students review the rules to the game. They use strategy skills to master the game.
Curated OER
Mental Math: Subtract Tens: Reteach
In this subtraction worksheet, 2nd graders use subtraction facts to help them complete the subtraction sentences. Students write in the missing numbers for each sentence and solve the problems. Students' objective is to learn to subtract...
Curated OER
Number and Number Relations: Lesson 4
Fourth graders investigate the use of addition and subtraction facts in different situations. They examine the relationship between addition and multiplication and determine which operation is needed to solve various problematic situations.
Curated OER
Multiplication and Areas
Upper graders solve problems involving measurement of squares and rectangles to practice multiplication skills, finding area, and calculating prices and percentages. A performance assessment is included.
Curated OER
Clock Arithmetic and Cryptography
Students perform basic operations in modular (clock) arithmetic. Students encode and decode messages using shift and affine ciphers. Students apply their multiplication, division, addition, and subtraction skills.
Math Learning Center
Grade 1 Supplement Set A4 – Number and Operations: Equivalent Names
Engage young mathematicians in developing their basic arithmetic skills with these great hands-on activities. Using Unifix® cubes to model a variety of single digit addition and subtract problems, children build a basic...
Curated OER
Shape Stretch
First graders practice addition and subtraction concepts using gross and fine motor movement. Working in small groups, 1st graders play a game to practice their addition and subtraction facts through gross and fine motor movement...
Curated OER
Visual Subtraction
In this math worksheet, students solve the problems that use the operation of subtraction for those who need visuals. The sheet is a teacher's guide.
Curated OER
Addition and Subtraction of Whole Numbers
Fourth graders answer word problems based on the fifty states. In this math word problem lesson, 4th graders understand that differences in problems require different math operations.
Curated OER
Solving Quadratic Equations
In this quadratic equations worksheet, 9th graders solve and complete 7 different problems that include factoring quadratics. First, they solve for the values of x that make the equation true. Then, students substitute their values into...
Curated OER
Conventions: Strong Verbs
Fifth graders practice using strong verbs. In this conventions lesson, 5th graders brainstorm words to complete sentences and list lively and exciting verbs. Students act out meanings of certain words. Students come up with new ways to...
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