Curated OER
Book Title: Ten Flashing Fireflies
This instructional activity engages learners in a variety of activities to build 1 to 1 correspondence, estimation, and problem solving skills. They discuss problem solving strategies, hear the story Ten Flashing Fireflies, compose...
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Add and Subtract within 20
Here is a more interesting way to practice addition and subtraction number sentences. Learners complete two sum boxes, adding across and down then totaling for a final sum. They do the same with subtraction in two more boxes. Finally,...
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Telling Time With Clocks/Bingo “Time”
Young learners create a clock by adding hands and placing the numbers in the correct location. After each learner has their very own clock, they explore each component. Review on the hour times, and then introduce them to five-minute...
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Number Sense
First graders practice rounding 4 digit numbers using place value concepts. In this estimating sums and differences lesson, 1st graders explore clustering, rounding, and front end estimation as methods for rounding decimals.
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Math Skills - Addition Review
For this addition worksheet, learners add 5 sets of one to three digit numbers. Students determine which numbers in a word problem need to be added and they find the sum of those numbers.
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Subtraction - Oral Questions
In this subtraction activity, students answer twelve 2-digit subtraction problems. The problems are example questions that are to be asked in oral form. For example, "What is 30 take away 12?" The answers are on the second page.
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Addition Exercises
For this adding one worksheet, students add numbers in a two-column graph to find the sums by adding one to the numerals one to nine in sequence and observe the answer patterns. Students find eight sums.
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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.
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Add and Subtract Decimals
In this decimal worksheet, learners read about adding and subtracting, then complete a set of 31 problems, adding, subtracting, solving for values of expressions and solving equations.
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Mentally Add and Subtract 10 or 100
Get your mental mathletes in top form with this number sequence worksheet! They must add or subtract 10 from a number to complete these number lines, finding the missing three-digit numeral from a list of answers. Encourage verbal or...
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Refresh Your Memory
For this math worksheet, 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.
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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.
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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.
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Problem-Solving Strategy: Find a Pattern: Problem Solving
In this math patterns instructional activity, students use the understand, plan, solve, and look back problem solving strategy to help them find the patterns for the two problems.
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Send More Gold
For this algebra worksheet, 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.
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Counting On Tens or Ones
In this mathematics worksheet, 1st graders count on tens or ones. They identify how many ones and tens that they are counting for each. Then, students write the sum for each problem.
Pennsylvania Department of Education
Adding and Subtracting Three-Digit Numbers by Jumping
Second graders use data to graph information and draw conclusions. In this instructional activity on data analysis, 2nd graders practice gathering, sorting, comparing, and graphing data. Students differentiate data that can and cannot...
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Ten Sly Piranhas: A Counting Story in Reverse
Students solve related addition and subtraction problems. In this addition and subtraction lesson, students use the book Ten Sly Piranhas by William Wise as the source of word problems for students to solve.
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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.
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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.
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Investigation - Who is Right?
Third graders explore mathematics by solving problems in groups. For this math functions lesson, 3rd graders demonstrate their understanding of addition and subtraction by completing two digit math problems. Students define a list of...
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Spaceship Math Addition R
In this addition learning exercise, learners 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.
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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.