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Worksheet
Curated OER

Adding Up

For Students 1st - 2nd
Sail through the land of three addends with this nautical-themed addition learning exercise. Scholars begin by using mental math to add seven sets of three numbers located on sailboats. Next, they apply this concept to eight horizontally...
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Lesson Plan
Curated OER

Grandpa's Chocolates

For Teachers 2nd - 4th
It's fun playing a game of "Guess What's in the Jacket Pocket?" Students read the question using the concept of doubles using mental math. They then share their solutions with the class.
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Lesson Plan
Curated OER

Mental Math for Adding Decimals

For Teachers 5th
Fifth graders work in groups to practice adding decimals. In this adding decimals lesson, 5th graders call out different money amounts to each other and mentally add the coins called out. Students take turns calling out and adding the...
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Worksheet
Math Mammoth

Mental Math

For Students 6th
In this math activity, 6th graders solve the problems that ask them to use the correct order to calculate the solutions to the six sets.
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Interactive
CK-12 Foundation

Problem Solving Plan, Mental Math: The Perfect Lemonade 2

For Students 7th - 10th
Drink in this resource. Young problem solvers investigate a different way of looking at the problem of filling four liters of water from a three-liter cylinder and a five-liter cylinder. Isometric grids help with this understanding.
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Interactive
CK-12 Foundation

Problem Solving Plan, Mental Math: The Perfect Lemonade 1

For Students 7th - 10th
Find the perfect amount of water for lemonade. Scholars solve the famous problem of measuring four liters of water using a three-liter container and a five-liter container. An interactive allows users to see each step of the solution.
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Interactive
CK-12 Foundation

Mental Math for Addition and Subtraction Equations: Marble Bag Collector

For Students 6th - 7th Standards
Don't lose your marbles as your learn about addition and subtraction equations. Pupils investigate the relationship between addition and subtraction by using an interactive. They drag different color marbles into a box and identify the...
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Interactive
CK-12 Foundation

Mental Math to Divide by Whole Number Powers of Ten: Bouncing Decimal Point

For Students 6th - 8th Standards
Five questions challenge mathematicians to divide whole numbers by powers of 10. A tool highlights how a bouncing decimal moves through the divisor. Question types include multiple choice and fill in the blank. A discussion question...
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Lesson Plan
For the Teachers

$1 Math

For Teachers 2nd - 7th Standards
Captivate your class by having them find the value of their names, different zoo animals, musical instruments, etc.,with a mental math lesson. Using the coding formula listed, children learn to fluently estimate and calculate simple sums.
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Worksheet
Curated OER

Mental Math: Use the Properties-Reteach

For Students 4th - 5th
In this mental math reteach worksheet, learners review the commutative, associative and distributive properties, then complete a set of 13 problems. A reference web site is given for additional activities.
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Worksheet
Curated OER

Finding a Way

For Students 3rd
In this mental math worksheet, 3rd graders use mental math to find and solve each missing product, sum and/or difference in each of the 4 paths. Students answer 1 short answer question relating to the paths.
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Lesson Plan
Curated OER

Krypto Math Game

For Teachers 3rd - 5th
Students play a math game. In this number sense and mental math activity, students play a game where they use mental math to form equations that result in the target number required to win the game.
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Handout
Prince Edward Island

Fact Learning, Mental Computation, Estimation

For Teachers 4th - 6th Standards
Need help with mental math in your classroom? This guide is full of tips, tricks, and examples to help the teacher encourage learners to use their brain instead of a calculator. Practice problems are included with reasons how to use...
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Worksheet
Curated OER

Mentally Add Two 2-Digit Numbers pg. 1

For Students 4th - 6th
Mental math addition is the focus of this worksheet. Students apply a strategy outlined in the worksheet to find the sums. In this worksheet, students find the answers for twenty problems. Answers appear at the end.
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Lesson Plan
Curated OER

Mental Multiplication and Division

For Teachers 4th - 5th
Students practice multiplication and division problems using mental math. They play the online game ArithmAttack to complete as many multiplications or divisions as possible in 60 seconds. Afterward, they complete a paper based follow up...
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Lesson Plan
Curated OER

Number Operations

For Teachers 8th - 10th
Students investigate integers and solve problems using integers. In this algebra lesson, students solve problems to help improve speed and accuracy of mental math. They develop a deeper knowledge of the way integers are used on a daily...
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Worksheet
Curated OER

What Must Be Added?

For Students 4th - 5th
In this addition learning exercise, students, while answering 15 addition questions, answer each question without doing any written work. Students solve each answer with mental math strategies.
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Worksheet
Curated OER

More Addition in Your Head

For Students 3rd - 5th
In this mental math addition worksheet, students determine sums. In this problem solving worksheet, students write answers to twenty problems.
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Worksheet
Curated OER

Mental Math: Subtract Hundreds practice 22.1

For Students 1st - 3rd
In this subtracting hundreds worksheet, students use mental math to subtract one-digit basic facts, convert them to hundreds, and subtract the hundreds. Students solve eight problems.
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Worksheet
Curated OER

Mental Math: Subtract Tens: Reteach

For Students 2nd
For 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...
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Worksheet
Curated OER

Mental Math Strategies

For Students 4th - 5th
In this mental math worksheet, learners read an information box that explains how to use breaking apart or compensation to solve addition or subtraction problems. Students add or subtract using mental math in 8 examples.
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Worksheet
Curated OER

Mental Math Strategies

For Students 3rd - 4th
In this mental math worksheet, students study the detailed instructions and examples for adding or subtracting numbers using "breaking apart" or compensation. Students solve 17 mental math problems.
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Worksheet
Curated OER

Mental Math Division

For Students 2nd - 3rd
In this finding the quotients worksheet, students use mental math to divide one-digit and two-digit numbers by one-digit numbers with no remainders. Students solve 40 problems.
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Worksheet
Curated OER

Mental Math Skills

For Students 2nd - 3rd
In this mental math worksheet, learners use a number line to count backwards and forwards, add doubles, add and subtract one, and add one-digit numbers. Students solve thirty problems.

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