Subtracting with borrowing (also called regrouping) is what we do when the digit on the top is smaller than the digit on the bottom in a subtraction problem. It's like asking the next-door neighbor (the tens place) for a little help! We borrow 10 from the next place value to the left, adding it to the current place value, so we can subtract. This makes the subtraction possible and gives us the correct answer. It might seem confusing at first, but with practice, it becomes much easier!
For example, in the problem $42 - 27$, we can't subtract 7 from 2. So, we borrow 10 from the 4 (which becomes 3), and add it to the 2, making it 12. Now we can subtract 7 from 12, which equals 5. Then we subtract 2 from 3, which equals 1. So, $42 - 27 = 15$.
Match the term with its definition:
| Term | Definition |
|---|---|
| 1. Difference | A. To take away one number from another. |
| 2. Subtract | B. The result of subtraction. |
| 3. Borrowing | C. The value of a digit based on its position in a number. |
| 4. Place Value | D. To take a ten from the next largest place value to perform subtraction. |
| 5. Regrouping | E. Another word for borrowing. |
When the top number is smaller than the bottom number, we need to _______. This means we take a _______ from the next place value to the left. For example, in 32 - 15, we borrow from the _______ place. After borrowing, the 2 becomes _______, and we can subtract.
Explain in your own words why borrowing is important in subtraction. Give an example of a real-life situation where you might need to use borrowing to solve a problem.
Please log in to post your answer.
Log InEarn 2 Points for answering. If your answer is selected as the best, you'll get +20 Points! 🚀