Multi-Digit Addition and Subtraction Math Example 4

Follow the full solution, then compare it with the other examples linked below.

Example 4

medium
A school library has 1,250 books. They donate 387 books. How many books remain?

Solution

  1. 1
    \(1250 - 387 = ?\)
  2. 2
    Subtract: ones \(0-7\): borrow, \(10-7=3\); tens \(4-8\): borrow, \(14-8=6\); hundreds \(1-3\): borrow, \(11-3=8\); thousands \(0\).
  3. 3
    Wait, recalculate: \(1250 - 387\): \(1250 - 400 = 850\), then \(850 + 13 = 863\).
  4. 4
    Result: 863.

Answer

863 books
\(1250 - 387 = 863\). The library keeps 863 books after the donation.

About Multi-Digit Addition and Subtraction

Adding and subtracting numbers with three or more digits using the standard algorithm, which involves regrouping (carrying) in addition and borrowing in subtraction.

Learn more about Multi-Digit Addition and Subtraction →

More Multi-Digit Addition and Subtraction Examples

Example 1 easy

Calculate (347 + 256) using column addition.

Example 2 medium

Calculate (803 - 457) using column subtraction with borrowing.

Example 3 easy

Calculate (528 + 364).

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