Curated OER
Estimate, Solve, and Check
Young scholars estimate, solve, and check a series of addition and subtraction number and word problems. They write their estimates on a recording sheet, compute and write the answer in the next column, and check their answer with a...
Curated OER
Arithmetic: Revision
Students practice with a variety of simple equations involving addition, subtraction, multiplication and division. Explanation is followed by each block of equations given to solve. They are set loose to complete additional equations for...
Curated OER
Place Value Practice (Tenths)
Students practice strategies solving problems with basic facts, framework, domain and early additive part-whole. They recall the compatible numbers to ten, solve problems with small numbers using a part-whole strategy and recall ten and...
Curated OER
A Borrower And A Lender Be
Second graders practice addition and subtraction in this fun, technology-based Mathematics lesson for the second grade classroom. The lesson includes resource links, video clips, interactive websites, and a section for pre-lesson...
Curated OER
Race to 50/100
Second graders practice utilizing multiple tens frames and dice to race to fifty or one hundred. They calculate tens and ones to find out how many counters they have on their grid and how many more they need to get to fifty or one...
Curated OER
Add and Subtract Decimals
In this decimal worksheet, students read about adding and subtracting, then complete a set of 31 problems, adding, subtracting, solving for values of expressions and solving equations.
Curated OER
Four + One = Five
In this algebra worksheet, students decipher a cryptarithm to make an addition problem. They have to figure out what digit each letter represent to be able to solve this problem. There is an answer key with this problem.
Curated OER
Number Tick Tack Toe:
Young scholars practice basic addition and subtration facts to twelve and use thinking skills to win at tick tack toe.
Curated OER
Wedded Bliss
In this Algebra I activity, 9th graders solve a cryptogram involving addition. The one page activity contains one question. Solutions are included.
Curated OER
Counting Money
Students read, write, and identify different coin combinations and use this information in real-world situations.
Education World
Counting with Marshmallows and Licorice
Here's a tasty lesson on place value! Learners practice counting by ones and tens using mini-marshmallows and licorice sticks. They count and add the mini-marshmallows, and use the licorice sticks to represents tens.
Curated OER
Place Value Lessons
Students can learn about place value using interesting lessons, activities, and games.
Curated OER
Hands On Math Lessons with Technology
Students explore a variety of math concepts. In this integrating technology lesson, students visit online webtools such as Max's Math Adventure, I Know That Math, Hands on Banking, and more. A description of each website is provided.
Curated OER
Popsicle Stick Regrouping Fun
Students demonstrate regrouping in subtraction. In this math computation instructional activity, students use popsicle sticks to practice the regrouping strategy. Students practice several examples of regrouping problems in small groups.
NumberNut
Number Nut: Addition: Adding Two Digit Numbers
Explains how to add two-digit numbers by focusing on each column of digits as you add, rather than the entire numbers.
Mr. Martini's Classroom
Mr. Martini's Classroom: Adding 2 Digit Numbers Showing the 1 Carry
Students add two-digit numbers with these interactive flashcards. The resource demonstrates how to carry a "1" in the tens or hundreds column.
NumberNut
Number Nut: Addition: 2 Digit Numbers
Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 100
A step-by-step tutorial showing how to add 2-digit numbers in place value columns without regrouping. Includes exercises to try. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000
Math Is Fun
Math Is Fun: Addition in Columns
Simple instruction on how to perform addition of two- and three-digit numbers using columns. View animated examples and follow links to column addition worksheets.
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 1000
Step-by-step tutorial showing how to add 3-digit numbers in place value columns with and without regrouping. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000