Mental Math Strategies for Adding & Subtracting Decimals | 5.NBT.B.7 Differentiated Help your students build fluency and confidence with adding and subtracting decimals using mental math strategies, compensation, compatible numbers, and the properties of operations! This fully differentiated math resource is designed to meet the needs of all learners—whether they need extra support or a challenge—while staying aligned to 5th grade standard 5.NBT.B.7. Perfect for math centers, small group instruc