Subtraction with Regrouping

Front

What is subtraction with regrouping?

Back

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

Front

How do you borrow in subtraction?

Back

To borrow, you take 1 from the next left column, decrease that digit by 1, and add 10 to the current column's digit.

Front

What is the result of 172 - 99?

Back

73

Front

What is the result of 407 - 188?

Back

219

Front

What is the result of 528 - 173?

Back

355

Front

What is the result of 500 - 288?

Back

212

Front

If Kathleen plays the trumpet for 54 minutes in the evening and 46 minutes in the morning, how much longer does she play in the evening?

Back

8 minutes

Front

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

Back

Identify if any digits in the top number are smaller than the corresponding digits in the bottom number.

Front

What do you do if you need to borrow from a column that is already zero?

Back

You continue to borrow from the next left column until you find a non-zero digit.

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 the correct digits from each other.