3rd Grade 3-Digit Subtraction Worksheet | mathpro365

ABOUT THE WORKSHEET

This printable 3rd Grade Math Worksheet is designed to significantly strengthen a student's fluency in three-digit subtraction. Subtraction is a fundamental pillar of elementary mathematics, and achieving mastery requires consistent, repetitive practice. This worksheet provides 40 unique problems presented in a clean, vertical format, which is the standard method for teaching essential regrouping (or "borrowing") techniques. By working through these diverse problems, students will learn to navigate place value correctly from the ones column up to the hundreds, ensuring they build a solid foundation for more complex arithmetic operations in future grades.

QUICK DETAILS

• Grade: Grade 3
• Topic: 3-Digit Subtraction
• Question Count: 40 Problems
• Format: Vertical Alignment Printable
• Answer Key: Available at mathpro365.com

STEP-BY-STEP SOLVED EXAMPLES

Here are three solved examples from the worksheet to help demonstrate the subtraction process with regrouping.

Example 1: Problem #1 (958 - 187)

First, subtract the ones: 8 - 7 = 1. Moving to the tens column, we cannot subtract 8 from 5, so we borrow 100 from the hundreds place. This changes the 5 tens into 15 tens. Now, 15 - 8 = 7. Finally, subtract the remaining hundreds: 8 - 1 = 7. The final answer is 771.

Example 2: Problem #5 (330 - 291)

Start in the ones column: 0 - 1 requires borrowing. Borrow from the tens to get 10 - 1 = 9. In the tens column, we now have 2 - 9, which requires borrowing from the hundreds. This gives us 12 - 9 = 3. Subtracting the hundreds leaves 2 - 2 = 0. The result is 39.

Example 3: Problem #6 (600 - 221)

This problem requires "subtracting across zeros." We borrow from the hundreds to make the tens a 10, then borrow again to make the ones a 10. Ones column: 10 - 1 = 9. Tens column: 9 - 2 = 7. Hundreds column: 5 - 2 = 3. The answer is 379.

TEACHER & PARENT TIPS

To help students succeed, encourage them to use grid paper to keep their numbers perfectly aligned in columns. For visual learners, using physical base-ten blocks is an excellent way to demonstrate how regrouping works. Finally, always remind students to check their work by adding their answer to the smaller number; if they get the top number back, they know their subtraction is correct!