Breadcrumb Home > Videos > Add 3-Digit Numbers Cite Add 3-Digit Numbers In this video, Alex learns how to use place values to add 3-digit numbers. TrendingHere are the facts and trivia that people are buzzing about. January 2021 Current Events: US News The Holocaust (1933–1945) Chinese New Year History, Meaning, and Celebrations Noble Titles and Ranks in a Monarchy The 5 Best Air Purifiers of 2020 Inaugural Trivia