Subtract Two-Digit Numbers Without Regrouping

Subtract Two-Digit Numbers Without Regrouping

What students learn

Students learn to subtract two-digit numbers by working in the ones place first and then the tens place. Open with Subtract 2-Digit Numbers: Start with the Ones so the first step is visible right away.

Why it matters

This lesson gives students a steady way to solve problems like 64 - 31 without losing track of place value. It builds accuracy and prepares them for harder subtraction later. For a second model, Subtract 2-Digit Numbers: Use Tens and Ones Blocks shows the same idea with visual support.

Learn the idea

When no regrouping is needed, subtraction stays organized: subtract the ones, then subtract the tens. That is the pattern students should hear and say aloud. Use Subtract 2-Digit Numbers: Then Subtract the Tens to close the loop on the written method, then compare it with Subtract 2-Digit Numbers: Check the Answer in the Story so students connect the math back to meaning.

Try it

Try 58 - 24, 76 - 33, and 92 - 41. Have the student circle the ones digits, subtract those first, then circle the tens digits and finish the problem. If the answer feels off, ask the child to rebuild the numbers with blocks and check each place separately.

Parent guide

Keep subtraction concrete. Let the child cross out or remove objects before writing the number sentence. If regrouping is not needed, remind them that the work should stay calm and orderly: ones first, tens second.