Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Tangent Sum and Difference Formulas

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn to rewrite tangent functions with addition or subtraction in their arguments in a more easily solvable form.
Unit Plan
Khan Academy

Khan Academy: Find the Missing Number (Add and Subtract Within 100)

For Students 1st - 3rd Standards
Practice solving problems like "___ - 45 = 27" where you have to figure out the missing value in an addition or subtraction equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
Activity
Scholastic

Scholastic: Math Maven's Mysteries: The Cuckoo Caper

For Students 3rd - 8th
The famous Clockenheimer Cuckoo is missing from Clockenheimer Clocks on Main Street! Help Math Maven get it back by solving a math riddle.
Unknown Type
Math Fact Cafe

Math Fact Cafe: Flashcards: 3rd Grade: Math Facts

For Students Pre-K - 1st
Practice your basic addition, subtraction, multiplication and division facts using these interactive flashcards. Each section gives you 20 flashcards. After each correct answer the card turns green. If you get an incorrect answer the...
Unit Plan
Khan Academy

Khan Academy: Add and Subtract Within 100 Word Problems 3

For Students 1st - 3rd Standards
Practice solving word problems with addition and subtraction. These questions are start unknown problems including add to and take from problems. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity...
Unknown Type
Khan Academy

Khan Academy: Add and Subtract Within 100 Word Problems 2

For Students 1st - 3rd Standards
Practice solving word problems with addition and subtraction. These questions are comparison problems including difference unknown, smaller value unknown, and bigger value unknown. Numbers used are 100 or less. Students receive immediate...
Unit Plan
Khan Academy

Khan Academy: Challenging Add and Subtract Word Problems (Within 100)

For Students 1st - 3rd Standards
Practice solving more challenging addition and subtraction word problems with "more" and "fewer". Multi-step problems are also included. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try...
Activity
CK-12 Foundation

Ck 12: Mental Math for Addition and Subtraction Equations

For Students 6th - 9th Standards
[Free Registration/Login Required] Students will use a real world example to solve single variable equations mentally. Click challenge me to answer a practice question and click learn more to watch a video.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding and Subtracting With Parentheses Iii

For Students 4th - 5th
[Free Registration/Login may be required to access all resource tools.] A video models finding a missing operation (addition or subtraction) by using order of operations with parentheses and working backwards. The practice problems...
Unknown Type
Khan Academy

Khan Academy: Adding Three Numbers

For Students Pre-K - 1st Standards
In this exercise, students practice addition and subtraction within 10. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Unknown Type
Khan Academy

Khan Academy: Add and Subtract Within 100 Word Problems 1

For Students 1st - 3rd Standards
Practice adding and subtracting to solve word problems. These questions are result unknown or change unknown problems. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try questions...
Unknown Type
Khan Academy

Khan Academy: Word Problems With "More" and "Fewer" 1

For Students Pre-K - 1st Standards
In this exercise, students practice word problems with "more" and "fewer". Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Unknown Type
Khan Academy

Khan Academy: Word Problems With "More" and "Fewer" 2

For Students Pre-K - 1st Standards
In this exercise, students practice word problems with "more" and "fewer" 2. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding and Subtracting Terms Numbers to 100

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] This is a tool that gives a video demonstration and follows up with a pratice activity that checks for understanding.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding and Subtracting to Determine the Longest

For Students 2nd - 4th Standards
[Free Registration/Login may be required to access all resource tools.] The video [0:34] describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics...
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding and Subtracting Fractions With Different Denominators

For Students 4th - 5th Standards
[Free Registration/Login may be required to access all resource tools.] This video gives steps of finding common denominators and then adding and subtracting multiple fractions together. After the video, there are practice problems...
Lesson Plan
PBS

Pbs Kids Afterschool Adventure!: Operation: Rainbow Math Activity Plan

For Teachers Pre-K - K
Red apples, orange candles, yellow stars, green frogs, and blue, indigo, and violet flowers-they all add up to Rainbow Math fun! During this adventure children learn the colors of the rainbow as they practice counting, adding and...
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Mixed Operations Selecting the Incorrect Sentence

For Students 3rd - 5th
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a series of multi-operation problems with addition and subtraction of three-digit numbers to determine which does not match the...
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Balancing the Equations Numbers to 1000

For Students 2nd - 4th
[Free Registration/Login may be required to access all resource tools.] The video shows how to use addition and subtraction to keep an equation balanced by working backwards to determine the missing value. The video is followed by...
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Challenge Flow Chart Numbers to 1000

For Students 3rd - 5th
[Free Registration/Login may be required to access all resource tools.] The video shows how to work through a flow chart of addition and subtraction with numbers up to 1000. The video is followed by practice problems covering the topics...
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Filling in the Missing or Sign Numbers to 100

For Students 1st - 2nd
[Free Registration/Login may be required to access all resource tools.] The video works through 2-digit addition and subtraction problems to determine which number sentence coincides with the given value. The video is followed by...
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Penguins: Twenty: Number 20 and Money

For Students 1st - 2nd Standards
Practice counting, addition, and subtraction by making sure all twenty penguins have enough clothes and food.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Comparing Sums or Differences Between Numbers

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students practice with addition and subtraction of whole numbers.
Unknown Type
Khan Academy

Khan Academy: Add and Subtract Matrices

For Students 9th - 10th Standards
Find the matrix that is the result of the addition or subtraction of two given matrices. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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