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Unit Plan
Khan Academy

Khan Academy: Subtract 10s and 100s (No Regrouping)

For Students 1st - 3rd
Practice subtracting 1, 10, or 100 from a number. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unknown Type
Khan Academy

Khan Academy: Add and Subtract Mixed Numbers (No Regrouping)

For Students 4th Standards
Practice adding and subtracting mixed numbers.
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Website
PBS

Pbs Learning Media: Figuring Out Elapsed Time

For Students 3rd - 8th
In this video segment from Cyberchase, through addition and regrouping in base sixty, Matt helps Digit figure out what time his CyberSouffle will be done.
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Website
PBS

Pbs Learning Media: Cooking Contest

For Students 3rd - 8th
In this Cyberchase video segment, Matt uses subtraction to help Digit figure out how much time he has left in a cooking contest with Hacker.
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Handout
Cool Math

Coolmath: Coolmath4kids: Subtracting Numbers Within 1000

For Students 3rd - 4th Standards
Step-by-step tutorial showing how to subtract numbers less than 1000 in place value columns with and without regrouping. Includes sample problems to try.
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Activity
NumberNut

Number Nut: Subtracting More Than Two Values

For Students 3rd - 5th Standards
Get the facts on how to subtract more than two values in this short subtraction lesson. This lesson offers step-by-step examples, suggested strategies and shortcuts, and links to related interactive games. Both games are fast-paced and...
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Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: Subtracting Whole Numbers and Decimals

For Students 3rd - 8th Standards
If you are looking for a website that explains and defines subtraction with decimals you have arrived at an excellent resource. There are even practice problems at the very end of the lesson.
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Unknown Type
NumberNut

Number Nut: Subtraction: Comparing Subtraction Differences (With Regrouping)

For Students 3rd - 5th Standards
Quiz where the player must calculate the answers for two subtraction problems with one- and two-digit numbers, where there is regrouping, and then must choose the correct symbol for comparing the differences (i.e., >, <, or =).
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Unknown Type
NumberNut

Number Nut: Subtraction: Comparing Subtraction Differences (No Regrouping)

For Students 3rd - 5th
Quiz where the player must calculate the answers for two subtraction problems with one- and two-digit numbers, where there is no regrouping, and then must choose the correct symbol for comparing the differences (i.e., >, <, or =).
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Lesson Plan
Better Lesson

Better Lesson: Cheerful Shoppers

For Teachers 2nd Standards
Second graders love to shop! Students will use their own shopping list to compose a word problem using addition and subtraction with and without regrouping, in order to help them better understand how to problem solve.
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Three Math (Page 5)

For Students 3rd - 6th Standards
Sharpen your computation skills with two-digit addition, two-digit subtraction, and one-digit multiplication facts using this interactive worksheet. Learners must be familiar with multiplication facts through twelve to be successful....
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Four Math (Page 1)

For Students 3rd - 8th Standards
This interactive worksheet combines all four operations. The focus is on addition and subtraction fact through one hundred and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and...
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Four Math (Page 2)

For Students 3rd - 8th Standards
This interactive worksheet combines all four operations. The focus is on three-digit addition and subtraction and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and would be...
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Four Math (Page 3)

For Students 3rd - 8th Standards
Build your computation skills using this interactive worksheet that focuses on all four operations including three-digit addition and subtraction and basic multiplication and division facts. This is an easy to navigate tool and learners...
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Three Math (Page 1)

For Students Pre-K - 1st Standards
Sharpen your mathematical skills with this interactive worksheet that combines two-digit addition, two-digit subtraction, and basic multiplication facts. This activity is easy to grasp and gives learners immediate feedback to their...
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Interactive
Quia

Quia: Subtracting to Win a Million

For Students 1st - 8th Standards
Students will love playing this "Who Wants to be a Millionaire," style game as they work through the subtraction problems. Some of the numbers are large, but there is no regrouping necessary.
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Two Math (Page 3)

For Students Pre-K - 1st Standards
Review basic addition and subtraction facts using this interactive worksheet. Problems are presented in horizontal format and offer immediate feedback. With only ten problems, this worksheet could also be used for a quick review or short...
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Handout
AAA Math

Aaa Math: Subtracting Four Digit Numbers

For Students 4th Standards
Demonstrates how to subtract two 4-digit numbers when there is regrouping. The explanation is followed by an interactive where students can practice this skill.
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Activity
Homeschool Math

Homeschool Math: Subtracting Mixed Numbers With Like Fractional Parts

For Students 5th Standards
A lesson about subtracting mixed numbers with like fractional parts using the strategies for the subtraction of regrouping and subtracting in parts (piece by piece).
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Handout
Cool Math

Coolmath: Coolmath4kids: Subtracting Numbers Within 100

For Students 2nd - 3rd Standards
Short tutorial showing how to subtract using two-digit numbers in tens and ones columns without regrouping.
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Whiteboard
ClassFlow

Class Flow: Ms. Marsha's Farm Math Review

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] This flipchart provides addition and subtraction word problems at second grade level, with regrouping.
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Unit Plan
Khan Academy

Khan Academy: Add and Subtract Mixed Numbers With Unlike Denominators 1

For Students 4th - 6th Standards
Practice adding and subtracting mixed numbers with different denominators. No regrouping required. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unit Plan
Khan Academy

Khan Academy: Subtract 1 or 10

For Students 1st - 3rd Standards
Practice subtracting 1 or 10 from a 2-digit number (no regrouping). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Activity
Teaching Treasures Publications

Teaching Treasures: Year Four Timed Mental Math (Page 2)

For Students 3rd - 5th Standards
Improve your computations skills in all four operations with this timed interactive worksheet. Solve ten problems in five minutes or less. Problems are presented in horizontal format and answers can be checked immediately. This worksheet...

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