Curated OER
Counting Money
Students read, write, and identify different coin combinations and use this information in real-world situations.
Curated OER
Math Review for Grade 4 (4.1)
In this math review for grade 4 (4.1) worksheet, 4th graders answer 25 multiple choice problems in standardized test format about all areas of 4th grade math.
Curated OER
Popsicle Stick Regrouping Fun
Students demonstrate regrouping in subtraction. In this math computation lesson, students use popsicle sticks to practice the regrouping strategy. Students practice several examples of regrouping problems in small groups.
Curated OER
Word Problems
In this algebra activity, 9th graders are asked to rewrite word problems using algebraic equations in one variable. There are other links on this page.
Curated OER
Junk Yard Math
Third graders explore the process of place value and subtraction through regrouping and borrowing exercises. Several activities using manipulatives are utilized in the lesson.
CK-12 Foundation
Ck 12: Elem Math: Subtracting 2 Digit Numbers With Regrouping
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a two-digit subtraction problem with regrouping. The video is followed by additional problems for students to practice the skills...
CK-12 Foundation
Ck 12: Elem Math: Subtracting 2 Digit Numbers Without Regrouping
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a two-digit subtraction problem without regrouping. The video is followed by additional problems for students to practice the skills...
CK-12 Foundation
Ck 12: Elem Math: Subtracting 2 Digit Numbers Without Regrouping
[Free Registration/Login may be required to access all resource tools.] The video shows a subtraction problem with two digit numbers. The video is followed by a series of practice questions to assess student comprehension of the concept.
Khan Academy
Khan Academy: Add 2 Digit Numbers by Making Tens
Students will be challenged in their skills to add 2-digit numbers by making tens
CK-12 Foundation
Ck 12: Elem Math: Subtracting 2 Digit Numbers With Regrouping
[Free Registration/Login may be required to access all resource tools.] The video describes how to subtract two-digit numbers using regrouping. The video is followed by additional problems for students to practice the skills discussed in...
Khan Academy
Khan Academy: Adding Two Digit Numbers by Making Tens
In this exercise, students practice adding two-digit numbers by making tens. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Subtract 2 Digit Numbers (No Regrouping)
Practice solving problems like 45 - 24. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Subtracting Two Digit Numbers (No Regrouping)
In this exercise, students practice subtracting two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.
Other
Nearpod: Subtraction With Regrouping: Two Digit
In this instructional activity on subtraction, students will use the break apart strategy, draw a model, or the standard algorithm to subtract 2-digit numbers.
NumberNut
Number Nut: Subtraction: Subtracting From Two Digit Numbers
Explains how to subtract from two-digit numbers, with or without regrouping.
AAA Math
Aaa Math: Adding Two Digit Numbers
This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...
Cool Math
Coolmath: Coolmath4kids: Subtracting Numbers Within 100
Short tutorial showing how to subtract using two-digit numbers in tens and ones columns without regrouping.
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
CK-12 Foundation
Ck 12: Elem Math: Subtracting One Digit Numbers in 2 Steps Word Problems
[Free Registration/Login may be required to access all resource tools.] Practice problems where students subtract one-digit numbers in two step word problems. A helpful video pops up if students are solving the problems incorrectly to...
Khan Academy
Khan Academy: Subtract 1 Digit Numbers With Regrouping
Practice solving problems like 46-9. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Primary Resources
Primary Resources: Addition and Subtraction Higher Numbers
An extensive selection of teacher resources to aide in teaching and reviewing addition and subtraction of two and three digit numbers, inverse operations, counting on, and other mental strategies for addition and subtraction. Resources...
Khan Academy
Khan Academy: Add 2 Digit Numbers (No Regrouping)
Practice solving problems like 24 + 45. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Subtract Within 100
Practice subtracting 2-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
NumberNut
Number Nut: Subtraction: 2 Digit Numbers
Subtracting from two-digit numbers can be "as easy as pie" when you follow these instructions. Then practice the skills doing the two interactive activities; one with regrouping and one without.