Max Rescues Dragonflies: Three-Digit Subtraction Sprint

About this Grade 3 3 Digit Subtraction Drill

Three-digit subtraction is a cornerstone skill that builds on the place-value understanding your third grader has been developing all year. At ages 8-9, students are ready to move beyond simple two-digit problems and tackle situations where regrouping (or borrowing) becomes necessary—a cognitive leap that requires careful attention to tens and ones places. This skill appears constantly in real life: calculating change at a store, figuring out how many pages remain in a book, or determining how many minutes until recess. Mastering 3-digit subtraction strengthens mental math flexibility and prepares students for division and multi-step word problems later. When students can confidently subtract within 1,000, they develop the number sense and procedural fluency that unlock success in upper elementary mathematics. This worksheet gives your child focused practice with the strategies they've learned in class, building speed and accuracy one problem at a time.

What your student will practice

• Subtract three-digit numbers with regrouping from tens and hundreds places
• Apply place-value understanding to align digits correctly in vertical subtraction
• Check subtraction answers using addition as an inverse operation
• Solve word problems requiring three-digit subtraction and reasoning

Common mistakes to watch for

The most common error is forgetting to regroup when the ones or tens digit in the top number is smaller than the digit below it. For example, a student might write 523 − 218 = 315 by subtracting 8 from 3 without borrowing, getting an impossible answer. Watch for students who regroup correctly but then forget to reduce the tens or hundreds place by one, creating careless mistakes even when their strategy is sound. A second frequent pattern is misaligning digits when numbers aren't written in columns, causing them to subtract 200 from 50 instead of 250 from 523.