This is a workbook I made for my UIL students covering all of the shortcuts needed to correctly answer problems 1-20 on the number sense test. For each shortcut, there is a description page, practice problems, and an answer sheet. This workbook totals over 50 pages, including the cover page and two table of contents pages. There are over 20 shortcuts covered, with practice problems and answers for each trick. I have over 12 years of experience teaching number sense and I've decided to put ev