2nd Grade Subtraction Within 20 — Under the Sea Printable Math Worksheet

Make subtraction practice a splashing good time! This **Under the Sea Subtraction** worksheet gives 2nd graders 20 carefully crafted subtraction problems within 20, all wrapped in a cheerful ocean theme. Cute sea-creature illustrations, bright colors, and a bonus "Coral Reef Challenge" section keep kids motivated from first problem to last. Perfect for morning work, homework, math centers, or early finishers. **Aligned to 2nd-grade subtraction within 20 fluency skills** (supports Common Core 2.OA.B.2). Print-and-go — no prep needed!