Math Mammoth Grade 5-A student worktext covers the four operations with whole numbers, large numbers, problem solving, and operations with decimals. It is meant for the first half of grade 5. This student worktext contains both the necessary instruction and the problems & exercises (the 'text' & and the 'work'; thus a "worktext"), and is fairly self-teaching. The curriculum meets and exceeds the Common Core standards. Please note this is a student worktext and does not contain answers.