2-Digit Subtraction - With Regrouping

Front

What is 2-digit subtraction with regrouping?

Back

2-digit subtraction with regrouping is a method used to subtract two-digit numbers where borrowing is necessary when the top digit is smaller than the bottom digit in any column.

Front

How do you perform regrouping in subtraction?

Back

To perform regrouping in subtraction, you borrow from the next left column. For example, if you need to subtract 7 from 5, you borrow 1 from the next column, making the 5 into 15 (5 + 10) and reducing the next column by 1.

Front

What is the first step in solving a 2-digit subtraction problem?

Back

The first step is to align the numbers vertically by their place values (tens and ones) and then start subtracting from the rightmost column.

Front

What do you do if the top digit is smaller than the bottom digit in the ones column?

Back

If the top digit is smaller than the bottom digit in the ones column, you need to regroup by borrowing from the tens column.

Front

What is the result of 57 - 20?

Back

The result of 57 - 20 is 37.

Front

What is the result of 64 - 28?

Back

The result of 64 - 28 is 36.

Front

What is the result of 50 - 22?

Back

The result of 50 - 22 is 28.

Front

What is the result of 50 - 21?

Back

The result of 50 - 21 is 29.

Front

Why is it important to line up numbers by place value in subtraction?

Back

It is important to line up numbers by place value to ensure that each digit is subtracted from the correct corresponding digit, which prevents errors in the calculation.

Front

What is borrowing in subtraction?

Back

Borrowing in subtraction is the process of taking 1 from the next left column to make the current column's top digit larger, allowing for the subtraction to be performed.