Education Development Center
Sum of Rational and Irrational is Irrational
Sometimes the indirect path is best. Scholars determine whether the sum of a rational number and an irrational number is irrational. Reading a transcript of a conversation between classmates leads to an indirect proof of this concept.
Math Drills
Santa's List Sums (F2)
Help Santa find the sum of the boys and girls that live on each street.
Curated OER
Estimating Sums of Money
By rounding, scholars find that adding money amounts becomes a breeze! They round two and three-digit numbers (with decimals) in these addition problems to get approximate sums. For each, mathematicians write the new addition equation...
Math Worksheets Land
Unknown Numbers in Sums and Differences
You've hit the word problem jackpot with this set of 10 addition and subtraction scenarios! For each, learners have to find a missing number. Sometimes it is the sum or difference, and for others, an addend or minuend. For each, there is...
Concord Consortium
Sum and Product
From linear to quadratic with a simple operation. An exploratory lesson challenges learners to find two linear functions that, when multiplied, produce a given parabola. The task includes the graph of the sum of the functions as well as...
Curated OER
Sum of Interior Angles
In this sum of interior angles worksheet, 10th graders solve 10 different problems that are related to determining the sum of various interior angles in figures. First, they determine the sum of the interior angles of a dodecagon. Then,...
Curated OER
Hidden Sums
In this finding the sums 7 and 8 worksheet, 1st graders look over two boxes of numbers, find the sums of 7 and 8 in each one and circle pairs of numbers that make each sum.
Curated OER
Sum Machine!
In this addition worksheet, 2nd graders find the sum of 14 addition math problems involving three-digit whole numbers. Students write 1 original addition problem that can be solved.
Curated OER
Santa's List Sums (C4)
In this addition instructional activity, students add up the sums of the boys and girls in each column to come up with a total. Students add up 17 problems of adding four digit numbers to come up with a sum.
Curated OER
Polygon Sum Conjecture
In this geometry instructional activity, 10th graders identify the missing angles using the polygons sum conjecture. They measure exterior and interior angles using their angle theorems. There are 63 problems.
Curated OER
Santa's List Sums
In this two-digit addition worksheet, 3rd graders add 17 sets of two-digit numbers and write each sum. A 3-part bonus question requires students to add all 17 numbers together.
Curated OER
More Santa's List Sums
In this two-digit addition worksheet, 3rd graders add 17 sets of two-digit numbers and write each sum. A 3-part bonus question requires the students to add up all 17 two-digit numbers.
Curated OER
Same Sums
In this same sums worksheet, 1st graders, working with a partner, cut out the 12 cards at the bottom of the worksheet, shuffle the cards, turn the cards over, take turns choosing 2 cards and keep each one if the sums match.
Curated OER
Missing Sums and Addends
In this recognizing two-digit addition facts worksheet, students use a number line and addition facts to find the missing sums or addends in problems with and without regrouping. Students solve 20 problems.
Curated OER
Estimating Sums and Differences
In this estimation worksheet, 4th graders estimate the sum or difference of 15 math problems. Students write their answers underneath each math problem on the worksheet.
Curated OER
Easter Eggs in a Basket-Sums to 1998 (B)
In this addition of three-digit numbers learning exercise, students add with regrouping and put only the Easter eggs with sums greater than one thousand one into the basket. Students solve 20 problems.
Curated OER
Hands-On: Sums of Angle Measures
In this angle measures worksheet, students solve six word problems where they are given 6 different polygons, some of which are complex, and must determine angle measures in order to arrive at a solution.
Houghton Mifflin Harcourt
Sums to 100
Whether it's counting marbles, flowers, or playing cards, small objects can add up to great sums. Learners work six story problems to practice addition to 100. Some regrouping is required, along with distinguishing useful from irrelevant...
Curated OER
Riemann Sums and the Definite Integral
In this integral worksheet, students use Riemann sums to estimate their answers. They answer story (or word) problems about distance/speed. Students are given a defined interval and use the Riemann sum to find the endpoints of the graph....
Curated OER
Errors in Riemann Sums
For this Riemann Sums worksheet, students use the Riemann Sums method to approximate the area under the curves. This two-page worksheet contains three problems.
Curated OER
Riemann Sums and Error Stacks
In this Riemann sums activity, students use accumulation to find the estimate for the area of a given shape. Students use Riemann sums to estimate the area under the curves and error stacks to bound the error of their approximation. They...
Curated OER
Estimate Sums: Reteach
In this estimating sums worksheet, students review two steps to help them estimate to find sums. Kids then round each addend to the nearest ten and use the number line for help. Students estimate the sums and write the numbers on the lines.
Curated OER
Estimate Sums: Practice
In this estimating sums worksheet, students round each addend to the nearest ten and then estimate the sums. Students finish with one test prep question by estimating for the sum.
Curated OER
Estimating Sums and Differences
In this math worksheet, students learn to estimate sums and differences by completing step by step exercises. There is one word problem which is the example, and then students can choose from other estimation activities to do with a...
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