SmartUp Learning

These exercises are designed to help students master addition and subtraction of numbers up to 1000. They are structured to gradually build confidence and fluency with three-digit numbers, including carrying (regrouping) in addition and borrowing (regrouping) in subtraction. The worksheets include a variety of problem types to strengthen both computation skills and mental math strategies. Key Features: Task-Oriented Practice – Each worksheet begins with a clear task instruction (e.g., “Add t