Interactive
CK-12 Foundation

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...
Interactive
CK-12 Foundation

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...
Worksheet
Savvas Learning

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...
Lesson Plan
Curated OER

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.
Lesson Plan
Curated OER

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...
Worksheet
Maths Blog

Adding/Subtracting Whole Numbers in Your Head

For Students 2nd - 3rd Standards
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...
Lesson Plan
Curated OER

Mental Math Counts

For Teachers 5th - 7th
Students use mental math. They describe reasonable and unreasonable sums and differences. Students use mental math to find the sums and differences of addition and subtraction facts at random. They solve addition and subtraction facts...
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 activity, 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...
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.
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...
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...
Lesson Plan
Curated OER

Krypto Math Game

For Teachers 3rd - 5th
Students play a math game. In this number sense and mental math lesson, students play a game where they use mental math to form equations that result in the target number required to win the game.
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...
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...
Lesson Plan
Curated OER

Two-Digit Subtraction With and Without Regrouping

For Teachers 2nd
Second graders subtract two-digit numbers. In this mathematics instructional activity, 2nd graders subtract both with and without regrouping. Students use manipulatives and place value mats to assist in problem solving.
Activity
Pedago Net

Math Games Using Dice and Cards to Promote Mental Strategies

For Teachers 3rd - 5th
Develop mental math skills using these fun partner games. Covering basic operations, each one offers differentiation options, extension ideas, and clear directions. Dice or cards is all you'll need to keep kids' attention as they...
Worksheet
Mental Arithmetic

Number Bonds to 10

For Students K - 2nd Standards
First graders solve the sums up to 10 using the mental math strategy of number bonding. Thirty different addition facts on the worksheet allow for plenty of practice.
Lesson Plan
Curated OER

Mental Arithmetic

For Teachers 5th
Fifth graders complete a mental arithmetic race worksheet while reviewing the associated concepts. In this mental math lesson, 5th graders complete as much of the associated worksheet as they are able to in one minute. They review and...
Lesson Plan
Curated OER

Swat Solution

For Teachers 1st - 4th
Students are divided into two teams. They then solve simple math problems using mental math. When they have the answer, they run and write their solutions on the board and swat it with a flyswatter. Then the next group moves up and takes...
Lesson Plan
Curated OER

Mental Money

For Teachers 3rd - 4th
Learners access prior knowledge to round numbers and add decimals. In this mental math lesson, students share the book Betcha and calculate estimates for three jars based on the book. Learners calculate money answers based on coins...
Worksheet
Mental Arithmetic

Mixed Addition and Subtraction Year 1

For Students 1st - 2nd Standards
Reinforce addition and subtraction with a 30-problem arithmetic worksheet in which scholars add and subtract numbers between one through 10. 
Lesson Plan
Curated OER

Rice Cookies Addition

For Teachers 4th
Fourth graders practice adding rice cookies. In this mental math lesson, 4th graders get into groups and call out numbers to each other to add mentally. Students use the rice cookies to show the answer.
Lesson Plan
Beacon Learning Center

Spotted Stones Linked Just Right

For Teachers 1st - 2nd Standards
Discover how to play the game of dominoes using mental math skills to solve equations that earn points. Pupils become fast critical thinkers in determining which unknown addend tally up points in their favor.
Lesson Plan
Curated OER

21 Game (Self Esteem)

For Teachers 2nd - 6th
Here's a simple math game that two people can play together. The first player says the number one or two. Then, the other player says the next one or two consecutive numbers. The goal of the game is to be the player who says "twenty-one"...

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