Khan Academy
Khan Academy: Estimate to Add and Subtract Multi Digit Whole Numbers
Use estimation to find a reasonable solution to multi-digit addition and subtraction problems. Numbers are less than or equal to 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Khan Academy
Khan Academy: Add and Subtract Complex Numbers
Practice addition and subtraction with complex numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Add and Subtract on a Number Line
Practice adding and subtracting numbers like 554 and 237 using a number line. All numbers are less than 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Other
Chili Math: Add and Subtract Numbers Using the Number Line
Adding and subtracting numbers on a number line is a neat way to see how numbers are added and subtracted using visual interpretations.
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 3
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...
Khan Academy
Khan Academy: Graphically Add and Subtract Complex Numbers
Add or subtract complex numbers, and plot the result in the complex plane. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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.
Other
Math Bugs Me: Add Subtract Integers
This website provides students tips on how to add integers using absolute value and by introducing them to a pattern.
PBS
Pbs Learning Media: Cyberchase: Competing for the Northern Hemisphere Games
In this short Cyberchase video, students learn about positive and negative numbers as Harry tries to score a total of 50 points in various events to qualify for the Northern Hemisphere games in New Orleans. [3:24]
Khan Academy
Khan Academy: Addition Within 100
In this exercise, students practice addition within 100. Students receive immediate feedback and have the opportunity to watch a tutorial video get hints, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2 Fluently add and...
Khan Academy
Khan Academy: Subtract Within 20
Practice subtracting. All numbers in these problems are 20 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a tutorial video, or receive hints.
Khan Academy
Khan Academy: Subtraction Within 100
In this exercise, students practice subtraction within 100. Students receive immediate feedback and have the opportunity to watch a video tutorial, get hints, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2 Fluently add and...
Khan Academy
Khan Academy: Addition Using Groups of 10 and 100
In this exercise, students practice addition using groups of 10 and 100. Students receive immediate feedback and have the opportunity to get hints, watch a video tutorial, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2...
Mr. Martini's Classroom
Mr. Martini's Classroom: Equivalent Addition Problems: Fill in the Blank
Students choose the correct number to balance the addition equation and create an equivalent sum.
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.
Mr. Martini's Classroom
Mr. Martini's Classroom: Addition Cards, Fill in the Blank
Students fill in the blank with the correct number to solve the addition problems. The problem changes color when the correct number is typed.
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