Subtraction with regrouping

Front

What is subtraction with regrouping?

Back

Subtraction with regrouping is a method used to subtract numbers when the top digit in a column is smaller than the bottom digit, requiring borrowing from the next column.

Front

How do you perform subtraction with regrouping?

Back

1. Start from the rightmost column. 2. If the top digit is smaller than the bottom digit, borrow from the next column. 3. Subtract the digits in each column from right to left.

Front

What is the difference between 'difference' and 'subtraction'?

Back

'Difference' is the result of a subtraction operation, while 'subtraction' is the mathematical operation itself.

Front

What is the first step in solving a subtraction problem with regrouping?

Back

Identify the columns from right to left and check if borrowing is needed.

Front

When do you need to borrow in subtraction?

Back

You need to borrow when the digit in the top number is smaller than the digit in the bottom number in any column.

Front

What does it mean to 'borrow' in subtraction?

Back

To 'borrow' means to take 1 from the next left column, which increases the current column's top digit by 10.

Front

Can you give an example of a subtraction problem that requires regrouping?

Back

Yes, for example, in 627 - 374, you need to borrow from the hundreds column to subtract 4 from 7.

Front

What is the result of 48 - 34?

Back

The result is 14.

Front

How do you check your subtraction answer?

Back

You can check your subtraction answer by adding the difference to the smaller number; if it equals the larger number, your answer is correct.

Front

What is the importance of lining up numbers by place value in subtraction?

Back

Lining up numbers by place value ensures that you subtract digits in the correct columns, which is essential for accurate calculations.