Mental Math Teacher Resources

Find Mental Math lesson plans and worksheets
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Mental Math and Compatible Numbers

For Teachers 4th - 7th
Strengthen the skills of mental math when using compatible numbers. Find numbers that benefit one another when doing the four operations. Practice correct estimating to make those operations go quicker and better understand if the...
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Mental Math: Adding 10s

For Students 1st
To develop mental math skills for adding 10s, learners read an example, solve one carefully scaffolded problem, and then complete 6 more independently. Pictures of 10-rods make the connection between sets of 10 and the corresponding...
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Mental Math: Subtract Tens, Problem Solving

For Students 2nd - 3rd
Subtracting by 10s is easy for your young learners with this worksheet! There are three questions to accompany a bar graph, and there's a space for learners to explain their answers. Encourage them to use mental math here! 
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Mental Math: Breaking Apart to Add

For Students 1st - 2nd
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. 
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Mental Math, Adding Decimals, Multiplication Facts

For Teachers 3rd - 4th
A thorough presentation is chock full of great tips on how to develop mental math skills, add decimals, and reinforce the memorization of multiplication facts. Learners solve a variety of problems, while getting tips along the way. An...
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Mental Math: Subtract Hundreds - Problem Solving 22.1

For Students 1st - 3rd Standards
Four word problems are presented to second graders. For each, they can use their mental math skills to quickly subtract hundreds and arrive at an answer. This is a terrific inclusion for your Common Core math curriculum.
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The Division Algorithm—Converting Decimal Division into Whole Number Division Using Mental Math

For Students 6th Standards
Make math much simpler with mental math methods. The 16th installment in a series of 21 looks at ways scholars can apply mental math to convert division problems into easier problems with the same quotient. Multiplying or dividing both...
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Mental Math: Subtract Hundreds - Homework 22.1

For Students 2nd Standards
Mental math skills are taught and practiced on this handy-dandy handout! On it, learners discover that focusing on the first digit of a three-digit hundreds number makes it easy to subtract hundreds. This is the perfect addition to your...
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Algebra: Use Mental Math to Solve Equations - Practice 2.8

For Students 5th - 6th
This problem solving activity requires mental math to solve 20 Algebra equations involving addition, division, subtraction and multiplication.
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Mental Math - Multiplication and Division

For Teachers 3rd - 5th
A challenging presentation outlines strategies for using mental math when multiplying and dividing. Learners solve a variety of problems while getting tips along the way. The PowerPoint should challenge even your best math pupils. Very...
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How Many Hundreds?

For Students 2nd - 3rd Standards
Mental math skills are really important to develop. Kids practice metal computation by first adding the hundreds then the tens and ones. There are nine addition and nine subtraction problems to solve. This attractive worksheet is...
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Algebra: Mental Math: Patterns in Multiples of 10

For Students 4th - 5th
In this mental math worksheet, students use a pattern or multiplication mental math to find each product. Students then multiply the final problems using multiples of 10.
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Algebra: Mental Math: Patterns in Multiples of 10: Homework

For Students 4th - 5th
In this multiplication patterns worksheet, students review the two ways to multiply multiple by 10 including using a pattern and mental math. Students then use a pattern or mental math to find each product. Students finish with one word...
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Algebra: Mental Math: Patterns in Multiples of 10: Practice

For Students 4th - 5th
In this multiplication pattern activity, students use a pattern or mental math multiplication to find each product that is a multiple of 10. Students then multiply the second set of problems and finish with two test prep questions.
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Using Mental Math to Multiply Decimals

For Students 4th - 6th
In this mental math practice worksheet, students multiply decimal numbers using mental math. Students solve 3 math word problems as well.
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Mental Math

For Students 2nd - 4th
In this mental math practice worksheet, students find the product in 20 1 digit multiplication problems, respond to 4 math word problems, and answer 2 visual thinking multiplication questions.
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Mental Math Warm-Up

For Students 1st - 8th
Use a simple warm-up that has pupils solving math equations to determine the number of reps for a certain exercise. Learners use mental math to solve basic equations. Next, they must do the same number reps of whatever exercise you...
EngageNY

Mental Math

For Students 10th - 12th Standards
Faster than a speedy calculator! Show your classes how to use polynomial identities to multiply numbers quickly using mental math. 
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Using Known Facts to Multiply and Divide Mentally

For Teachers 4th - 5th
Building strong mental-math skills requires learners to have a strong number sense. They practice multiplying two and three-digit numbers in their heads using estimation or approximation. They estimate or round each number and then...
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Speed Trials: Final Test

For Students 3rd - 5th Standards
How quickly can your third graders solve these 63 math problems? Ranging from addition, subtraction, multiplication, and division, you can use this resource to assess your students' mental math. Cut the activity into thirds to make the...
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Addition Practice #2

For Students 2nd - 3rd Standards
Encourage young scholars to tap into their inner math-whiz as they add three and four-addend equations. The first 36 problems each have three addends (none over two-digit), and are written horizontally. Next, they complete eight more...
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Number Puzzles

For Students 1st - 2nd Standards
These math puzzles are sure to get your first and second graders thinking. Nine word problems about odds and evens, as well as greater than and less than, keep learners guessing. If you're working on mental math in your class, use these...
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Subtraction Word Problems

For Students 1st - 2nd Standards
Practice mental math using a worksheet full of subtraction word problems! First graders subtract slices of pizza, books from a shelf, and balls that are buried by a dog. They write the answer to each problem in the space provided after...
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Counting Up and Down

For Students 1st Standards
These number sequences are missing quite a few digits; can your scholars determine some of them? Because learners aren't filling in every blank, they must utilize mental math to determine only the few numbers indicated. They count...

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