Explains how to add two-digit numbers by focusing on each column of digits as you add, rather than the entire numbers.

Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.

On this interactive website students practice various math skills using a real life scenario at a hamburger restaurant. Those skills include adding two-digit numbers and three-digit numbers.

Canoe Puppies is a multiplayer math game that allows students from anywhere in the world to race against each other while practicing adding two-digit numbers!