Charleston School District
Pythagorean Theorem and Converse
You've heard that it is true, but can you prove it? Scholars learn the Pythagorean Theorem through proof. After an overview of proofs of the theorem, learners apply it to prove triangles are right and to problem solve. This is the second...
Virginia Department of Education
How Many Triangles?
Something for young mathematicians to remember: the sum of any two sides must be greater than the third. Class members investigates the Triangle Inequality Theorem to find the relationship between the sides of a triangle. At the...
Curated OER
Making 10
For this making ten worksheet, students add to ten by using two number cards. Students think of as many ways possible to use 2 cards (from 1 to 9) to make a sum of ten.
abcteach
Simple Integer Addition
Add to your collection of math resources with this skills practice activity. Offering dozens of addition problems with sums less than 100, this resource is a simple way to hone the basic skills of young mathematicians.
Illustrative Mathematics
A Bobbie Bear's Buttons
Young mathematicians help Bobbie Bear pick colored buttons out of a box as they learn how to decompose numbers less than 10 into pairs of smaller numbers. To support students with the process, consider creating a worksheet or graphic...
Curated OER
Recalling Multiplication and Division Facts
A fabulous presentation on multiplication and division facts. In it, learners work in pairs to solve all sorts of problems, puzzles, brain teasers, and mental math problems. These problems focus on multiplication, division, rounding, and...
Curated OER
Easter Addition
For this Easter addition worksheet, young scholars problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
Curated OER
Easter Addition
In this Easter addition worksheet, young scholars problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
Curated OER
Easter Addition
In this Easter addition worksheet, students problem solve and calculate the answers to twenty-five addition equations and color all of the Easter eggs that have an even numbered sum.
EngageNY
Interpreting Expected Value
Investigate expected value as a long-run average. The eighth installment of a 21-part module has scholars rolling pairs of dice to determine the average sum. They find aggregate data by working in groups and interpret expected value as...
Illustrative Mathematics
Equivalent Expressions
Here is a straight-forward problem of multiplying two binomials with a twist. It is up to algebra learners to decide how to turn this product of sums into a sum of products. However, it is not the quadratic that is the answer; it is the...
Curated OER
Two-Digit Addition at the Zoo
Your second graders explore two digit addition with regrouping. They will investigate problem solving strategies within the context of a trip to the zoo. Multiple resources and assessments are provided.
Maths Blog
Adding/Subtracting Whole Numbers in Your Head
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...
Curated OER
Adding Animals
Writing equations from images helps young mathematicians grasp addition, especially when they get to look at cute animals as they do it. There are six number sentences here, each illustrated with a set of animals corresponding to...
DK Publishing
Addition Practice #2
Encourage young scholars to tap into their inner math-whiz as they add three and four-addend equations. The first 36 problems each have three addends (none over two-digit), and are written horizontally. Next, they complete eight more...
Curated OER
More and Less
Mental mathematicians add and subtract 1, 10, and 100 from sets of numbers. Each set of one, two and three-digit numbers gives scholars a chance to practice their addition and subtraction skills. There are 62 whole numbers in all. What...
Curated OER
Subtraction Word Problems #1
Practice subtraction skills and word problem strategies with your second graders. After reviewing the example at the top of the page, learners solve 14 word problems involving subtraction. A great way to practice mental math!
EngageNY
Secant Lines; Secant Lines That Meet Inside a Circle
Young mathematicians identify different cases of intersecting secant lines. They then investigate the case where secant lines meet inside a circle.
Curated OER
Add and Subtract Within 20
Break down addition and subtraction into short sentences using this brief worksheet. Each question prompts scholars to make a number by doing three math operations. For the first, they make 10 by adding three, adding five, and...
Curated OER
Integer Addition; Range (-9) to (+9) (J)
In this addition worksheet, students find the sums to 54 integer addition problems with addends that range between (-9) and (+9). They find the sums to the horizontal problems.
Curated OER
A Total of 10
In this addition review worksheet, students practice adding numbers between 1 and 10. Students color the grids with addition sentences that have a sum of 10, 9, 8, and 7 according to the instructions.
Curated OER
Integer Addition; Range (-99) to (+99) (E)
In this addition worksheet, students find the sums to 54 horizontal, integer addition problems in which the addends have a range of (-99) to (+99).
Curated OER
Adding 9 to a Single Digit
In this addition worksheet, learners practice adding 9 to 10 single digit numbers. Students write the sum of each problem in the boxes provided.
Curated OER
Adding 4 to a Single Digit
In this addition worksheet, learners practice adding the number 4 to 10 single digit whole numbers. Students write their sums in the boxes provided.