Quia
Quia: Adding to 10
This website for young children gives them practice adding sums to 10. Problems are presented as teddy bears to add up with the corresponding digits that represent the problem symbolically.
Khan Academy
Khan Academy: Subtraction Within 1000
In this exercise, students practice subtraction within 1000. Students receive immediate feedback and have the opportunity to get hints, watch video tutorials, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2 Fluently add and...
Quia
Quia: Add Your Way to a Million (Rags to Riches)
You can earn a million bucks playing this addition game. A succinct multiple choice game with hints, if you need them. Contains simple computation problems mixed with a few word problems. Must be able to add up to the millions place (one...
PBS
Pbs Learning Media: Cooking Contest
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.