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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...
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...
Unit Plan
Khan Academy

Khan Academy: Absolute Value to Find Distance Challenge

For Students 6th - 8th Standards
Solve conceptually challenging absolute value problems. In order to succeed at these problems, you'll need to remember that the absolute value of the difference of two numbers is the distance between those numbers. Students receive...
Activity
Annenberg Foundation

Annenberg Learner: Patterns in Mathematics: Mystery Operations

For Students 3rd - 8th Standards
This interactive activity allows you to change an equation's numbers in an attempt to figure out what operations are being used to control the answers.

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