EngageNY
The Division Algorithm—Converting Decimal Division into Whole Number Division Using Mental Math
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...
Curated OER
Mental Math: Breaking Apart to Add
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.
Savvas Learning
How Many Hundreds?
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...
Curated OER
Multiplying by 10 and 100
Work on multiplication and division with your fifth graders. They practice multiplying and dividing by 10s and 100s in four sections of problems, all written in varying formats. A great way to reinforce your math lesson!
Curated OER
Mental Math: Dividing Multiples of 10, 100, and 1,000
In this dividing multiples activity, 4th graders solve 8 mental math problems dividing by a variety of different multiples of 10. Students solve 3 word problems.
Mental Arithmetic
Number Bonds to 10
First graders solve the sums up to 10 using the mental math strategy of number bonding. Thirty different addition facts on the instructional activity allow for plenty of practice.
Curated OER
Leveled Problem Solving Equations and Mental Math
In this equations and mental math practice worksheet, students sharpen their problem solving skills as they solve 6 story problems.
Curated OER
Mentally Add and Subtract 10 or 100
Don't let the title of this one fool you; scholars skip count only by 10 in this number sequence instructional activity. They fill in missing numbers on a number line to complete each sequence, adding or subtracting 10. There are two...
Curated OER
Mental Math: Multiplying Multiples of 10, 100, and 1,000
Fourth graders practice mental math in this Multiples of 10, 100, and 1,000 worksheet. Students solve twelve multiplication problems by applying patterns with zeroes. The worksheet includes a review with examples of the patterns with zeros.
Curated OER
Mental Math: Multiplying Multiples of Ten- Reteaching Worksheet
In this mental math: multiples of ten reteaching worksheet, 4th graders review the steps of using a basic fact and a pattern of zeros to multiply mentally. They find the products in 16 examples, and use a table to answer 2 more.
EngageNY
Finding One Hundred Percent Given Another Percent
Class members solve problems to find the whole when given a percent. They use double line numbers and factors of hundred to help break the 100 percent into equal segments.
Geography 360°
Exponents
Don't let the rules overrule the activity. Mental math steps in and helps learners understand exponent patterns. The material focuses on the introductory problems of exponents, such as simplifying expressions. Teacher guides are...
Curated OER
Recognizing Multiples
Can your fourth graders recognize multiples of 10? What about 11 and 12? Use this activity to enhance your multiplication lesson, or to assess what your math students already know about finding multiples. Given six sets of numbers, they...
Curated OER
Using Doubles
Bring this easy shortcut to your first grade addition lesson! By adding doubles (6+6, for example), and then adding or subtracting 1, kids learn how to solve simple addition problems with ease. This trick is especially helpful for...
Curated OER
Mentally Add and Subtract 10 or 100
Here are some number lines that need to be completed. There are two number sequences, one to test addition skills and the other for subtraction. Both sequences include counting by 10, but the subtracting question has scholars count...
EngageNY
Fluency with Percents
Pupils build confidence working with percents as they work several types of percent problems to increase their fluency. The resource contains two sets of problems specifically designed to build efficiency in finding solutions of basic...
Curated OER
Finding a Way
In this mental math activity, 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.
Curated OER
Math Path
In this mental math worksheet, learners practice counting money and comparing amounts. They first count the total amount of money that each of the 3 children will find on their way to the bank, and then they answer 2 questions about the...
DK Publishing
Real-Life Word Problems, Part 2
Are you looking for word problems to fit into your Common Core math lesson? Use this resource to assess your third graders' problem-solving skills. They read 14 word problems involving multiplication and division, and write the answers...
Curated OER
Mental Math Strategies
In this mental math learning exercise, 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.
Curated OER
Mental Math Strategies
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.
Curated OER
Mental Math: Fraction and Decimal Equivalents
In this fraction and decimal equivalents practice worksheet, students sharpen their problem solving skills as they solve 6 story problems that require them to use mental math.
Illustrative Mathematics
Coupon Versus Discount
All too often stores give coupons for an item, but when you go into buy it, the item is on discount. The store won’t take the coupon if the discount is used. So what do you do, use the coupon or take the discount? This activity helps...
Virginia Department of Education
Properties
Examine some properties that don't require a general contractor. Scholars first complete a mental math activity that uses the properties of real numbers. A separate activity formalizes these properties.