He says by the time U.S. students are in fifth grade, they'll have fallen behind their peers in other countries in fluency with least common multiples, areas of non-rectangular shapes, percentages, ratios and graphs such as pie charts and bar graphs, just to name a few examples. (indianapublicmedia.org)
These worksheets will generate 10, 15 or 20 Least Common Multiple problems per worksheet. (math-aids.com)
It includes 148 task cards that cover the following: Practice and reinforcement in writing, reading, and evaluating expressions in which letters stand for numbers The least common multiple and the greatest common factor. (tes.com)