Curated OER
Adding Mixed Numbers
In this mixed numbers worksheet, 6th graders solve 20 different problems that include adding mixed numbers. First, they determine the least common denominator in each problem. Then, students determine the equivalent fractions and add the...
Curated OER
Add Two Digit Numbers - Vertical
In this problem solving learning exercise, students add together 20 problems involving 2-digit whole numbers. Students record their answers underneath each problem.
Curated OER
Adding Mixed Numbers Practice
In this addition of mixed numbers worksheet, students complete a total of 72 problems, 36 per page. Answers are included. A reference web site is given for additional activities.
Math Centre
Fractions: Adding and Subtracting
Young mathematicians piece together the puzzle of fractions. Starting with the addition and subtraction of fractions with like denominators, this series of example problems and skills practice exercises transitions students to working...
University of Minnesota
Fraction Operations and Initial Decimal Ideas
Add another strategy to the toolboxes of young mathematicians with this elementary math lesson on using number lines to add and subtract fractions.
Curated OER
Mental Math: Breaking Apart to Add
Develop mental math addition skills by breaking apart addends into 10s and extras. Worksheet has problem solving steps at the top of the page, and 8 practice exercises that lead to increasing independence using the process.
Maths Blog
Adding/Subtracting Whole Numbers in Your Head
Exercise those mental math muscles! This worksheet contains 10 addition and 10 subtraction problems which require learners to compute sums or differences in their heads. A quick review at the top of the page provides a strategy based on...
Virginia Department of Education
Integers: Addition and Subtraction
Young mathematicians construct their own understanding of integers with an inquiry-based math lesson. Using colored chips to represent positive and negative numbers, children model a series of addition and subtraction problems as they...
EngageNY
Linear Transformations Review
Time for matrices and complex numbers to come together. Individuals use matrices to add and multiply complex numbers by a scalar. The instructional activity makes a strong connection between the operations and graphical transformations.
Shodor Education Foundation
Two Variable Function Pump
Use a function to operate on two variables. Pupils look at operating with complex numbers as a function of two variables. The interactive squares the input and adds a constant to it. Learners visualize the resulting output and its...
CK-12 Foundation
Sequence of Partial Sums: Partial Sums
Have some fun building squares out of triangles. Pupils investigate the partial sums of odd numbers. Using the sum of the first four odd numbers, learners see that it can be rewritten as a sum containing a triangular number. Simplifying...
Teacher Created Materials
Rounding Numbers
Pupils practice rounding numbers to the nearest ten and hundred. They solve rounding numbers word problems, and add and subtract rounded numbers. This nice, neat handout fully serves its purpose and can help meet CCSS.Math.Content.3.NBT.1.
Curated OER
Choosing the Operation: Add or Subtract
Try a new approach to addition and subtraction by giving scholars the numbers but leaving out the sign. They must determine if the numbers have been added or subtracted, then write in the appropriate operation. There are a few examples...
Project Maths
Complex Number Operations
What do animated videos have to do with mathematics? Using operations of complex numbers and their representations on the complex plane, high schoolers observe how mathematics could be used to move animations. The lesson provides an...
Illustrative Mathematics
Mile High
What is the meaning of sea level? This resource helps your class understand the meaning of elevations above, below, and at sea level. Provides for good discussion on using positive and negative numbers to represent quantities in the real...
CK-12 Foundation
DeMoivre's Theorem and nth Roots: The nth Roots of Unity
The nth roots of unity all have a magnitude of one. Scholars use the unit circle and DeMoivre's Theorem to find the complex roots of one and discover that the complex numbers all lie on the unit circle and are equally spaced around it...
K-5 Math Teaching Resources
Large Ten Frame 11-20 (With Numbers)
An excellent way to review math ten frames, this series of posters reminds kids how to mark numbers 11-20. Each pages features a ten frame with the first ten spots filled out to indicate 10, then additional frames to indicate how many...
Curated OER
Addition of Numbers (Under 100) - Guided Lesson Explanations
Rather than a worksheet, this teacher resource is a one-page, scripted answer sheet for a guided lesson on the addition of numbers under 100. While the pupil handout is missing, the teacher guide could be reformatted for classroom use.
Curated OER
Add and Subtract within 20 - Independent Practice
Although this instructional activity says it contains addition and subtraction within 20, it doesn't. Learners will have to add and subtract double-digit numbers with answers up to at least 30. However, it does provide good practice.
Curated OER
Two-Digit Plus One-Digit Addition (A)
For this math worksheet, students solve 100 problems in which 2 digits are added to one digit numbers. Example: 44 + 9. Problems are written in a vertical format and are closely spaced.
Curated OER
Understanding Whole Numbers
In this understanding whole numbers worksheet, 4th graders use a computer program for instruction, then answer 16 problems about addition and subtraction.
Curated OER
Adding Mixed Numbers
In this adding mixed numbers worksheet, students add mixed numbers with uncommon denominators. Students complete 9 problems total.
Curated OER
Adding mixed numbers
In this mixed numbers worksheet, students practice adding mixed numbers together. Students complete 4 problems where they add mixed numbers.
Curated OER
Multiplication: One and Two Digit Numbers
In this multiplication worksheet, students multiply one digit numbers by two digit numbers and three digit numbers. Students complete 28 problems.
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