Master the fundamentals of place value and mental math with this comprehensive assessment and practice pack focused on finding 10 more and 10 less of any two-digit number. Aligned with Common Core standard 1.NBT.C.5, this resource provides a structured progression to help first-grade students move from basic counting to advanced mental computation. The materials are organized into clear levels—Emerging, Developing, Proficient, and Enriched—allowing teachers to easily differentiate instruction and track student growth. Whether students are just beginning to count by tens to 100 or are ready to challenge themselves by mentally adding and subtracting multiples of ten from three-digit numbers, this pack offers the targeted support they need.

Each level includes “Check” assessments designed to evaluate specific competencies, such as adding multiples of 10 to single-digit numbers and mentally finding ten more or ten less without the need for manual counting. The resource features a variety of exercise types, including fill-in-the-blank sequences, equation solving, and logic-based problems that require students to identify correct mathematical reasoning. Complete with a detailed answer key for quick grading, this product is an essential tool for any international educator looking to build strong numerical fluency and confidence in their students’ mathematical abilities.