Curated OER
Chisanbop (Korean Counting to 99)
Students practice their counting skills. In this counting lesson, students discover the Chisanbop method of counting which allows them to quickly count to 99 using their hands.
Curated OER
Triangle Sums
Fourth graders determine a way to place numbers in the nine circles that are arranged in a triangular pattern so that each side has an equal sum. They use each number once and practice adding single digit numbers.
Curated OER
Refresh Your Memory
In this math learning exercise, students break down one digit numbers by thinking of numbers which can be added together to get that sum. Students then relate simple subtraction facts in the same family. There are 15 problems.
Curated OER
Rounding
In this rounding numbers worksheet, students review how to round numbers and then practice by rounding the first set of numbers to the nearest ten using the number line. Students then round the second set of numbers to the nearest ten.
Curated OER
Worksheet #10
In this mathematics worksheet, 2nd graders solve various problems by either adding or subtracting when necessary two-digit terms. They use a number line at the top for help solving each.
Curated OER
Title Balancing With Tidy Numbers
Students use math manipulatives (ice block sticks) to show the addition of two 2-digit numbers. They discuss short-cuts that might be used to make the problem easier. they apply the same principle for adding larger numbers, as well.
Curated OER
Let's Take a Trip!
Sixth graders plan trip for family of four, and choose best travel plan by studying maps, considering different routes, and visiting Web sites to get airline and travel schedules.
Curated OER
Problem-Solving Strategy: Find a Pattern: Problem Solving
In this math patterns worksheet, students use the understand, plan, solve, and look back problem solving strategy to help them find the patterns for the two problems.
Curated OER
Addition - Adding on Ones Sheet 2
In this missing addend worksheet, students fill in missing addends to arrive at given sums. All numbers are 2-digit. A reference website is given for additional activities.
Curated OER
Correcting Bad Data Using Parity Bits
In this parity bits worksheet, students read about pixels and data strings. Students are given 2 data strings that are corrupted by cosmic ray glitches and they identify the bad data and create a valid data string.
Curated OER
Grade 3: Palindrome Patterns
Third graders use addition to create numbers that are palindromes and organize their results to look for patterns. They make generalizations from patterns and practice reading large numbers and addition with regrouping.
Curated OER
Multiplication With Decimals
In this multiplying decimals instructional activity, students solve 24 multiplication problems. Each problem has a decimal being multiplied by a two or three-digit number.
Curated OER
Send More Gold
In this algebra learning exercise, 9th graders decipher a cryptarithm to get the word money in numbers. Each letter represents a value that can be added together for a final answer. There is an answer key with this lesson.
Pennsylvania Department of Education
Adding and Subtracting Three-Digit Numbers by Jumping
Second graders use data to graph information and draw conclusions. In this lesson on data analysis, 2nd graders practice gathering, sorting, comparing, and graphing data. Students differentiate data that can and cannot change over time.
Curated OER
Ten Sly Piranhas: A Counting Story in Reverse
Students solve related addition and subtraction problems. In this addition and subtraction activity, students use the book Ten Sly Piranhas by William Wise as the source of word problems for students to solve.
Curated OER
Add Whole Numbers
In this addition practice worksheet, students practice their math skills as they solve 21 addition problems that require them to add 3 digit numbers, 4 digit numbers, and money. Students also answer 2 test prep questions.
Illustrative Mathematics
Toll Bridge Puzzle
Here is a great problem-solving activity for young mathematicians. Intended solely for instructional purposes, the activity is appropriate for learners to add four numbers together. Not only must they add four numbers together,...
Curated OER
Tens and Ones
Learners view three problems involving adding or subtracting with ones and tens. Each problem is followed by an explanation and an answer as to how the problem should be done. Note: This resource contains incorrect grammar and could be...
Curated OER
Multiplying by 10
In this multiplying by 10 worksheet, youngters read about multiplying by 10 and review a 10's multiplication chart, then fill in the missing numbers in a multiply by 10 grid and complete multiplication problems.
Curated OER
Find Three Partners
In this addition worksheet, students solve 5 problems in which a picture is analyzed and a number sentence written to go with it. Students solve the addition problems. There will be three single digit numbers added in each problem.
Curated OER
Spaceship Math Addition M
In this addition instructional activity, students solve 40 problems in which single digit numbers are added. This is a drill of basic addition facts. There are no graphics or pictures on this page.
Curated OER
Spaceship Math Addition R
In this addition activity, students solve 40 problems in which single digit numbers are added. This is a drill of basic addition facts. There are no graphics or pictures on this page.
Curated OER
Word problems involving number relationships
In this Algebra I worksheet, 9th graders solve word problems in one variable that are based on relationships in numbers. The one page worksheet contains thirty problems. Answers are not provided.
Curated OER
Rounding
The two rules of rounding are expertly-covered in this math PowerPoint. Young mathematicians are instructed to look at the number to the right of the place value they must round to. If the number is 0-4, the number stays the same. If the...