The Spectrum(R) Math Workbook for second grade features 160 pages of focused instruction and progressive practice to help students stay ahead in math and enhance problem-solving skills. --This standards-based workbook provides systematic and thought-provoking practice designed to increase in complexity for the following content areas: adding and subtracting two- and three-digit numbers, writing numbers in expanded form, components of 3-D shapes, fractions, and metric and customary measurement. With easy-to-follow instructions, tests, and an included answer key, parents and teachers can accurately monitor students’ progress. --The best-selling Spectrum series is a favorite of parents and teachers because it's carefully designed to be both effective and engaging––the perfect building blocks for a lifetime of learning.