Khan Academy
Khan Academy: Select Strategies for Adding Within 100
Practice telling which strategies work for adding two numbers within 100. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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...
Khan Academy
Khan Academy: Adding and Subtracting on the Number Line Word Problems
In this exercise, students practice adding and subtracting on the number line in word problems. Students receive immediate feedback and have the opportunity to watch a video tutorial, get hints, and try questions repeatedly.
Khan Academy
Khan Academy: Add Using Groups of 10 and 100
Practice making groups of 10 and 100 while adding 3-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: Toll Bridge Puzzle
You are on a trip and need to cross a bridge, but you have to pay tolls in coins. Solve this puzzle by making your way to the island only using 100 coins.
Khan Academy
Khan Academy: Add and Subtract on the Number Line Word Problems
Practice adding and subtracting using the number line. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Teaching Treasures Publications
Teaching Treasures: Year Four Math (Page 1)
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...
PBS
Pbs Learning Media: Pbs Idea Channel Collection
Explore the crossroads of art, science, and pop culture with PBS Idea Channel. Hosted by Mike Rugnetta, the Idea Channel launched in 2012 and has since posted over 100 videos, with more added every Wednesday. The program has quickly...
ClassFlow
Class Flow: Addition Subtraction
[Free Registration/Login Required] The pages of this flipchart demonstrate methods for adding and subtracting near multiples of ten and give the children opportunities to practice these methods. You may consider using a 100 square for...
Council for Economic Education
Econ Ed Link: Le Bron James, the Cavaliers, and Derived Demand
PBS video author Paul Solman reports that LeBron James has added $200 million in value to the city of Cleveland since 2003. His presence brings in $100 million each year to the workers and local businesses surrounding the NBA team. The...
ClassFlow
Class Flow: Mental Addition and Subtraction
[Free Registration/Login Required] The pages of this flipchart demonstrate methods for adding and subtracting near multiples of ten, and give the children opportunities to practice these methods. You may consider using a 100 square for...