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 borrowing from the next left column.

Front

What does it mean to 'regroup' in subtraction?

Back

Regrouping in subtraction means to borrow from the next higher place value when the digit in the current place value is smaller than the digit being subtracted.

Front

How do you subtract 436 - 89 using regrouping?

Back

First, regroup 436 to 426 (borrowing 1 from the tens place), then subtract: 6 - 9 (regrouped) = 7, 2 - 8 (regrouped) = 4, 4 - 0 = 4. The answer is 347.

Front

What is the result of 55 - 46?

Back

The result is 9.

Front

How do you solve 641 - 368 using regrouping?

Back

Regroup 641 to 631 (borrowing from the hundreds), then subtract: 1 - 8 (regrouped) = 3, 3 - 6 = 7, 6 - 3 = 2. The answer is 273.

Front

What is the answer to 738 - 259?

Back

The answer is 479.

Front

How do you subtract 517 - 135?

Back

Regroup 517 to 507 (borrowing from the tens), then subtract: 7 - 5 = 2, 0 - 3 (regrouped) = 2, 5 - 1 = 4. The answer is 382.

Front

What is the first step in subtraction with regrouping?

Back

The first step is to check if you need to regroup by comparing the digits in each column.

Front

Why is regrouping necessary in subtraction?

Back

Regrouping is necessary when the digit in the top number is smaller than the digit in the bottom number in any column.

Front

What is a common mistake when subtracting with regrouping?

Back

A common mistake is forgetting to borrow from the next column when needed.