Breadcrumb Home > Videos > Adding Decimals Using Mental Math Grade 5 Cite Adding Decimals Using Mental Math Grade 5 In this video, Carlos learns how to mentally add numbers with decimals. 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