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Add and subtract four-digit numbers

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Learn it Line up the places. Work from the ones to the thousands, regrouping as needed.

Example: $3{,}458 + 2{,}375$

  1. Ones: 8 + 5 = 13, carry 1.
  2. Tens: 5 + 7 + 1 = 13, carry 1.
  3. Hundreds: 4 + 3 + 1 = 8. Thousands: 3 + 2 = 5. Answer 5,833.

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