Math Mammoth Grade 5-B, comprises a complete math curriculum for the second half of fifth grade mathematics studies. The curriculum meets the Common Core standards.The first half of fifth grade is covered in Math Mammoth Grade 5-A.This product, Math Mammoth Grade 5-B, covers multiplying decimals by decimals, dividing decimals by decimals, and conversions between measuring units (chapter 6), addition and subtraction of fractions (chapter 7), multiplication and division of fractions (chapter 8),