1st Grade Subtraction Worksheets - Ocean Theme (Medium)

This 1st grade subtraction worksheet includes 20 medium-level practice exercises designed specifically for 1st Grade students, with moderately challenging exercises that strengthen core skills and encourage deeper thinking. These balanced activities progressively build complexity, making them perfect for students who have grasped the basics of subtraction and are ready to deepen their understanding. Students will practice subtracting numbers, building fluency with regrouping, number sense, and mental math strategies. Skills covered include subtraction facts, mental math, number sense, regrouping. Perfect for classroom practice, homework assignments, or homeschool curriculum. A separate printable answer key is included for quick and easy grading.