What is 400 - 221

Answer: 400 - 221 = 179

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Subtraction using Regrouping or Borrowing

  • Step 1: Arrange the numbers 400, 221 to align them properly in respective columns for ones, tens, hundreds, and Thousands… stacking them vertically.
  • Step 2: Begin by subtracting the digits in the one's place. If the bottom digit is greater than the top digit, borrow 1 from the tens column which will be combined to the number at the one's place.
  • Step 3: After giving 1 to the one's place, the number at the ten's place will be reduced by one number. Next, subtract the numbers at the one's place.
  • Step 4: We apply step 2 to the remaining digits in two-digit and larger numbers. As and when we borrow, we subtract the numbers simultaneously. Finally, we get the answer as 179

The following animation demonstrates the Regrouping/Borrowing method,

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O T H 10 9 3 0 0 4 1 2 2 - 9 7 1 ©AskMathGuru

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