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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Algebra: Use Mental Math to Solve Equations - Practice 2.8

For Students 5th - 6th
This problem solving learning exercise 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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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, 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: 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: 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: 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 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...
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Mental Math: Subtract Hundreds

For Students 3rd
In this subtraction activity, 3rd graders study a mathematical scenario about 2 airplanes and then answer/solve 5 problems involving subtracting hundreds.
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Mental Math to Evaluate Products: Mental Math Halloween Candy

For Students 6th
Time to put those mental math strategies into play with an interactive that has learners thinking about how many candies three friends get altogether.
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Mental Math to Divide by Whole Number Powers of Ten: Mental Math to Divide Decimal Powers of Ten

For Students 6th - 8th Standards
Boost mental-math skills with an interactive that focuses on dividing whole numbers by powers of 10. Mathematicians solve five fill-in-the-blank and multiple-choice questions with help from a moveable decimal point in four example...
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Mental Math to Multiply by Whole Number Powers of Ten: The Rule for Tens

For Students 6th - 8th Standards
Eight questions challenge scholars to use mental math while multiplying whole numbers by powers of 10. A tool with bouncing decimals demonstrates how and where the decimal moves. Question types include several multiple-choice, a...
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The Reason It Is Unreasonable enrichment 18.3

For Students 4th - 5th
In this determining reasonable and unreasonable percents word problem learning exercise, students use mental math and estimation to solve and determine if statements are reasonable or unreasonable. Students solve and explain six problems.
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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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Mental Math Workouts

For Students 3rd - 4th
In this mental math learning exercise, students complete 30 questions on two pages. All questions are different and varied; none require paper and pencil calculations.
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Mental Math Relay

For Teachers 4th
Fourth graders use mental math, paper and pencil and calculators to solve problems. They are put into teams and race to see who gets the most correct answers per round. This lesson strengthen mental math and estimation skills.
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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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Number of the Week

For Teachers 3rd - 5th
Here is an inventive, easy, and quick mental math activity you can use with your charges each week. You write a number on the board, then a student selects a card which tells them what to do with the number. One card says, "Multiply by...
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The Big Bus Module: Mental Math

For Teachers K - 3rd
Young mathematicians respond to math problems presented on screen. They use the computer mouse, and are introduced to the computer program. Students are shown ten problems, along with ten possible answers. They click on an answer and...
2:59
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How Do You Mentally Find Percents That are Powers of 10?

For Teachers 6th - 8th
Powers of 10 are about moving the decimal around. The instructor illustrates how to move the decimal when it's ten percent or it's one percent. Once you understand this procedure you can do the mental math, in your head of course!
3:35
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How Do You Mentally Find Percents That are Powers of 10?

For Teachers 6th - 12th
Powers of 10 are about moving the decimal around. The instructor illustrates how to move the decimal when it's ten percent or it's one percent. Once you understand this procedure you can do the mental math, in your head of course!
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Easy Mental Multiplication

For Students 5th - 6th
In this math learning exercise, learners learn to multiply larger numbers by one or two digits mentally. Students read the simple techniques and then solve 25 multiplication problems using these mental math skills.

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