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Activity
Illustrative Mathematics

Find the Angle

For Teachers 7th - 10th Standards
This a fun problem for young geometers to play with while gaining important insight into deductive reasoning. Some will find the answers very quickly, others might take a less direct path, but all will use their knowledge of the sum of...
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Lesson Plan
Illustrative Mathematics

Kiri's Mathematics Match Game

For Teachers K - 2nd Standards
Learning math is so much more fun when it involves playing games. Following the rules of the classic game Memory, young mathematicians flip over two cards at a time as they look for numbers whose sum or difference is equal to the value...
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Lesson Plan
Illustrative Mathematics

$20 Dot Map

For Teachers K - 2nd Standards
Challenge the addition skills of young learners with this open-ended math problem. The task is simple, get from start to finish by connecting a series of three numbers. The trick is that the sum of the numbers must be less than or equal...
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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

Estimate Sums

For Students 3rd - 5th
In this estimating sums worksheet, students solve 6 word problems where they estimate the sum of 3 digit numbers by rounding to the nearest 10, 100 or 1000.
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Lesson Plan
Curated OER

Finding The Sum of an Infinite Series

For Teachers 9th - 12th
Students examine finding the sum of an infinite series as the limit of partial sums. Through hands-on activities, students create their own sequence by finding the area of a square and then cutting it in half-sized pieces. They write...
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Worksheet
Curated OER

Using Riemann Sums

For Students Higher Ed
In the Riemann sums worksheet, students use Riemann sums to estimate the area under a curve. They calculate intervals and subintervals. Students create a graph picturing the intervals. This seven-page worksheet contains explanations...
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Worksheet
Curated OER

Apple Addition - To Sums of 10

For Students 1st - 2nd
In this addition worksheet, students add columns of one-digit numerals. They write their answer in the apple provided below the addition equation. There are 25 problems on a page and four pages are provided. Sums are not greater than 10....
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Worksheet
Curated OER

Understanding and Computing Riemann Sums

For Students Higher Ed
In this Riemann sum instructional activity, students use the Riemann sum to determine the volume of a square pyramid and the estimates of area around a circle. This four-page instructional activity contains 18 problems.
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Worksheet
Curated OER

Polygons - Sum of Interior Angles

For Students 7th - 8th
In this polygon activity, students determine the sum of the interior angles of a figure. Given the sum of the interior angles, they determine the number of sides of a polygon and the measure of one central angle. This one-page activity...
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Lesson Plan
Curated OER

Telescoping Sums Theorem

For Teachers 11th - Higher Ed
In this math worksheet, students read the information and examples that progressively prove the Telescoping Sums Theorem. They work the examples on their own.
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Lesson Plan
Curated OER

Addition Facts With Sums to 18

For Teachers 2nd - 3rd
Students explore addition facts with sums to 18. Using Unifix cubes, students demonstrate addition sentences. They use a variety of manipulatives to illustrate addition facts for different sums. Students participate in a flash card game...
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Worksheet
Curated OER

Sum and Product of the Roots

For Students 10th - 11th
In this root instructional activity, students determine the sum and product of given roots. They write quadratic equations for specified roots. This one-page instructional activity contains ten problems.
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Lesson Plan
Curated OER

Patterns in the Sums of Polygon Angles

For Teachers 6th
Sixth graders discover the patterns of sums of polygon angles. In this math lesson, 6th graders study the properties of geometric shapes to solve problems as they participate in hands-on activities.
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Worksheet
Print and Practice

Adding With Andy: Sums to 10

For Students 1st - 2nd
in this addition worksheet, students complete a set of 24 problems, adding problems with sums to 10. An answer key in included.
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Worksheet
Curated OER

Lab 2: Euler's Method and Riemann's Sums

For Students Higher Ed
In this Euler's Method and Riemann's Sum worksheet, students identify the best situation in which to use Euler's Method and Riemann's Sum. They identify the initial value of a problem and use the accumulation formula to determine the...
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Worksheet
Curated OER

Riemann Sums and Error Control

For Students 12th - Higher Ed
In this Riemann sums worksheet, students use the Riemann sums to approximate a given area. This two-page worksheet contains two multi-step problems.
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Worksheet
Curated OER

Topic 6.5 - Sum and Product of Roots

For Students 8th - 10th
In this sum and product of roots worksheet, students solve each of the 9 equations on the page. They then find the sum and product of the roots to check their solution.
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Worksheet
Curated OER

Angle Sum and Difference

For Students 11th
In this angle sum and difference worksheet, 11th graders solve 10 different problems related to determining the angle sum and difference of numbers. First, they determine the exact value of sine and cosine degrees. Then, students utilize...
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Worksheet
Curated OER

Hands On: Find Decimal Sums and Differences

For Students 4th - 7th
In this finding decimal sums and differences practice worksheet, students sharpen their problem solving skills as they solve 6 story problems.
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Worksheet
Curated OER

Addition: Missing Sums and Addends

For Students 3rd - 4th
In this addition worksheet, students fill in missing sums and addends in a set of 20 problems. Some problems involve regrouping, answers are included on page 2.
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Worksheet
Curated OER

Find Missing Sums and Addends-No Regrouping

For Students 2nd - 3rd
For this addition worksheet, students find missing sums and addends in a set of 20 problems without regrouping. Answers are included on page 2.
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Worksheet
Curated OER

Quiz: 15 Estimating Fractions Sums and Differences

For Students 5th - 6th
In this estimating fraction sums and differences worksheet, students complete a total of 15 problems. Answers are included on page 2. Labeled as quiz but suitable for practice.
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Worksheet
Curated OER

Finding the missing vales and the sums for Geometric Series

For Students 10th - 12th
In this geometric sums worksheet, students find the indicated sum of eight geometric series, the missing values of ten series, and solves for twelve addition problems related to geometric series.

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