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, reducing it by 1, and add 10 to the current column.

Front

What is the result of 64 - 19?

Back

45

Front

What is the result of 803 - 458?

Back

345

Front

What is the result of 70 - 23?

Back

47

Front

What is the result of 25 - 7?

Back

18

Front

What is the result of 73 - 27?

Back

46

Front

When do you need to regroup in subtraction?

Back

You need to regroup 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 'regroup' in subtraction?

Back

Regrouping means to borrow from the next column to make the subtraction possible.

Front

If you have 50 - 27, how do you solve it?

Back

You would regroup by borrowing from the 5 in the tens place, making it 4, and adding 10 to the 0 in the ones place, making it 10. Then, you can subtract 10 - 7 and 4 - 2.