This is a Smartboard activity that allows students to practice working with rounding decimals. The problems in this file have students round to the ones place, tenths place, hundredths place, and thousandths place. There are a total of 21 problems. The answers are included on each page for immediate student feedback. The preview file has thumbnail shots of many of the pages from this file. This can be used in whole group, small group, or as a math center.