Double Digit Subtraction with Regrouping #1

Front

What is double digit subtraction?

Back

Double digit subtraction is the process of subtracting numbers that have two digits, such as 45 - 37.

Front

What does regrouping mean in subtraction?

Back

Regrouping in subtraction means borrowing from the next higher place value when the top digit is smaller than the bottom digit.

Front

How do you subtract 45 - 37?

Back

First, regroup the 5 in the tens place of 45 to borrow 1 from the 4 in the tens place, making it 3. Then, subtract: 15 - 7 = 8 and 3 - 3 = 0, so the answer is 8.

Front

What is the result of 32 - 14?

Back

The result of 32 - 14 is 18.

Front

How do you solve 81 - 32?

Back

Subtract the ones: 1 - 2 (regroup to make it 11 - 2 = 9). Then subtract the tens: 7 - 3 = 4. So, 81 - 32 = 49.

Front

What is the answer to 46 - 27?

Back

The answer to 46 - 27 is 19.

Front

How do you subtract 51 - 18?

Back

First, regroup the 1 in the tens place of 51 to borrow 1 from the 5, making it 4. Then, subtract: 11 - 8 = 3 and 4 - 1 = 3, so the answer is 33.

Front

What is the first step in double digit subtraction?

Back

The first step is to line up the numbers by place value, with the larger number on top.

Front

Why do we regroup in subtraction?

Back

We regroup in subtraction to make sure we can subtract each digit correctly, especially when the top digit is smaller than the bottom digit.

Front

What is a common mistake in double digit subtraction?

Back

A common mistake is forgetting to regroup when needed, which can lead to incorrect answers.