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Subtraction with Regrouping Up to 1000

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3rd Grade Math

11. 3.NBT.A.2

11.12 Subtraction with Regrouping Up to 1000

Subtraction with Regrouping up to 1000

Practice 3-digit subtraction with regrouping up to 1000, learning exactly when and how to borrow from the tens and hundreds columns.

What You'll Learn

Recognize when regrouping is needed because a top digit is smaller than the digit being subtracted below it

Apply the borrowing rule by taking 1 group of ten from the next column, such as turning 5 ones into \( 15 \) ones

Work through columns right to left, ones then tens then hundreds, adjusting each column after a borrow

Solve double-regrouping problems where borrowing happens in two columns in the same subtraction, like \( 500 - 267 \)

Check a completed subtraction by adding the answer back to the number being subtracted to confirm it matches the start

Estimate the answer first with rounded numbers to catch mistakes before doing the exact column subtraction

What You'll Practice

Subtracting three-digit numbers requiring regrouping in one or more places

Solving problems where zeros require multiple regrouping steps

Filling in missing digits in subtraction equations with regrouping

Why This Matters

Subtraction with regrouping is essential for everyday math like calculating change, measuring distances, and managing budgets. Mastering this skill builds the foundation for multi-digit operations, decimal subtraction, and problem-solving in higher-level math.

This Unit Includes

1 Video lesson

Practice exercises

Learning resources

Skills

Regrouping

Borrowing

Three-Digit Subtraction

Place Value

Mental Math

OH Curriculum Aligned