Curated OER
Think of a Number
In this math worksheet, students engage in a mental math activity. Student think a number and follow several computations with that number and always come up with the answer 9. Students discuss why this happens.
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Hidden Hundreds
This is a great puzzle like challenge for your advanced learners. They are given 5 problems to solve, they must show how many ways they can make to provided number using the given numbers in the box. For example: To make 800 they need to...
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Pokemon Are Smart and Healthy
Students play a dodge-ball type game (with bean bags) as they perform a number of mental math and physical challenges.
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Multiplying by 10, by 100, and by 1,000
Fourth graders write tenths and hundredths in decimal and fraction notations. In this math lesson, learners know the fraction and decimal equivalents for halves and fourths. Everyone answers numerous questions posed by the teacher...
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Direction and Angle: Positions and Directions
This is an interesting mix of concepts. Half of this presentation provides double-digit addition and subtraction practice and the other half has students discuss cardinal directions and right angles. Use these together, or use them on...
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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.
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Addition-up to 20
In this addition worksheet, students work out problems that can be equal up to 20. These 40 problems are lined up side by side.
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Multi-Digit Multiplication
Fourth graders practice mastering the ability to multiply multi-digit numbers utilizing rectangular arrays and a variety of mental math strategies. They model and illustrate meanings of multiplication and division of whole numbers and...
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Ways to Add
In this addition worksheet, students learn several different options to add the numerals twenty-four and thirty. The options are models, mental math, a hundreds chart, or pencil and paper.
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Multiplication Strategies and Writing Story Problems
Third graders model multiplication problems using Unifix cubes. They compute and solve problems involving addition and subtraction of 3- and 4- digit numbers and basic facts of multiplication and division. They practice mental math...
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Add Decimals Mentally
In this adding decimals worksheet, students add a set of 5 decimal problems, then put missing decimal numbers to make sums add up to the number 1. Answers included, a reference web site is given for additional activities.
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Addition and Subtraction of Decimals
In these decimal skills worksheets, students solve the equations and word problems using addition or subtraction. Students then solve the decimal equations and word problems using addition or subtraction.
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Addition Strategies: Compensation
In this math worksheet, students learn the addition strategy of compensation: adding an easy number like 10, 20 or 30 and then subtracting a very small number like 1 or 2. Students solve 12 problems on the page.
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Matrix Madness!!
Perform operations to add, subtract, multiply and divide matrices. Then solve problems with vectors using matrices. A three day lesson plan: Matrix Madness, Mystical Matrices, and Decode the Encode. The last lesson plan has prizes that...
California Education Partners
John's Trip Disneyland
It all adds up to one. Pupils solve several items that involve finding sums of fractions in relationship to a whole. The assessment task uses fractions with unlike denominators to determine the amount of a tank of gas and the amount of...
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How Many Under the Shell?
Children discover basic addition and subtraction facts. They play an online game in which they practice addition and subtraction facts. This could be a perfect computer lab activity for your students to engage in.
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Counting Back and Counting On
Read aloud your choice of books about counting on and counting back (a list is provided, or tell stories of your own). Your learners will write horizontal equations to portray what happens in the story. They build a paper chain and...
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Adding Decimals
In decimal addition worksheet, students practice their math skills as they mentally add the decimal numbers in 6 problems, fill in 4 patterns, and solve 4 more decimal problems.
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The Nuts and Bolts of a Mathematical Expression
Fourth graders complete a worksheet that asks them to order operations within a mathematical expression. students evaluate the expressions in the correct order using mental math and paper. The results are recorded on the worksheet.
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Addition up to 12
In this addition worksheet, learners add two numbers that will equal up to 12. In these 12 questions, the addition problem is set up side by side.
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Addition-Up to 12 Sheet #7
In this addition worksheet, students practice their addition skills. Students complete the worksheet by filling in the missing numbers in each of the fifty-nine boxes.
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Calculator Spelling
Sixth graders practice creating and solving number sentences on a calculator. They interact with number facts, their properties, algorithms and estimation. Each student recognizes inverse relationships of addition, subtraction,...
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Properties: Commutative, Associative, and Identity
Students explore the concept of addition and multiplication properties. In this addition and multiplication properties instructional activity, students create a foldable with the properties commutative, associative, identity, and...
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Basketball: Number Sense
Third graders explore their addition and subtraction skills. In this number sense lesson, 3rd graders analyze different scoring possibilities for a basketball game. This lesson incorporates the use a video titled "Blossom and...