Spectrum(R) Subtraction for grade 1 provides focused practice in subtracting numbers within 100. Aligned to state standards, these activities include using visual models to represent problems, unknown number equations, place value strategies, and fluency drills.The Spectrum series offers early learning workbooks that help your child thrive in today's standards-based classroom. Spectrum Subtraction builds math readiness with rigorous practice. This resource provides focused instruction and a systematic approach to skill development for concept mastery.Spectrum is your child's path to academic success. This best-selling workbook series provides quality educational activities that meet your child's needs for learning achievement. These comprehensive workbooks address essential skills in reading, language arts, math, and science. Students in prekindergarten to grade 8 will find lessons and exercises that help them progress through increasingly difficult subject matter. Complete answer keys, content reviews, and assessments help students track their progress and locate areas for improvement. No matter your child's academic need, Spectrum is with you every step of the way.