Subtracting Multi-Digit Numbers for 4th Grade
To subtract multi-digit numbers, line up the place values and regroup from the next column whenever the top digit is smaller. Regrouping across a zero is the case that causes most errors. The examples below work through both, with practice problems and answers.
DETAILED EXPLANATION
Subtract by aligning by place value and subtracting from right to left. Regroup (borrow) when the top digit is smaller than the bottom digit in a column.
WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
Subtract 5,023 − 2,847.
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Solutions:
Step 1: Apply the concept from the lesson above.
Step 2: Carry out the operation or reasoning.
Answer: 5,023 − 2,847 = 2,176 (regroup from tens and hundreds as needed).
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