Column Subtraction with Borrowing / Regrouping: Worksheets and Answers
Column Subtraction with Borrowing / Regrouping: Interactive Questions
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How to do Column Subtraction with Borrowing / Regrouping
We want to subtract 226, so this must be written below 592.
We begin with the units column. However, the 6 is larger than the 2, so we can’t subtract it without regrouping.
We must therefore borrow some units from the tens column. We can borrow from the 9 tens.
We regroup 1 ten to borrow and we carry it over into the units column, next to the 2. In total, we now have 12 units. This leaves us with 8 tens in the tens column.
Following this regrouping, we can now subtract the units.
12 – 6 = 6
Next, we look at the tens column.
Because we borrowed from the 9, we are now left with 8 tens.
8 – 2 = 6
Finally, we look at the hundreds column.
5 – 2 = 3
Therefore,
592 – 226 = 366.
Another column subtraction example that we will look at is 674 – 482.
Again, we line up the digits of each number according to their place value columns. We start by subtracting the digits in the units column.
4 – 2 = 2
Next, we look at the tens column.
The 8 is larger than the 7, so we can’t take it away without regrouping. We must therefore borrow from the 6 in the hundreds column.
We regroup 1 hundred for the tens column and write it next to the 7. This gives us 17 in the tens column. We are left with 5 in the hundreds column.
Following this borrowing, we can now subtract the tens column.
17 – 8 = 9
Finally, we look at the hundreds column.
Because we borrowed from the 6, we are now left with 5 hundreds.
5 – 4 = 1
Therefore,
674 – 482 = 192.
