Two-Digit Subtraction with Regrouping

Front

What is two-digit subtraction with regrouping?

Back

Two-digit subtraction with regrouping is a method used to subtract numbers where borrowing is necessary, typically when the digit in the minuend (the top number) is smaller than the digit in the subtrahend (the bottom number) in any given place value.

Tags

CCSS.7.NS.A.1C

Front

How do you perform subtraction with regrouping?

Back

To perform subtraction with regrouping, start from the rightmost digit. If the top digit is smaller than the bottom digit, borrow 1 from the next left digit, reducing it by 1 and adding 10 to the current digit. Then, subtract as usual.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the result of 79 - 54?

Back

The result of 79 - 54 is 25.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What does it mean to 'borrow' in subtraction?

Back

Borrowing in subtraction means taking 1 from the next left digit to add 10 to the current digit, allowing for the subtraction to be performed when the top digit is smaller than the bottom digit.

Tags

CCSS.7.NS.A.1C

Front

In the problem '97 - 86', what is the first step to solve it?

Back

The first step is to look at the ones place: 7 (from 97) is smaller than 6 (from 86), so you need to borrow from the tens place.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is the answer to the question: 'How many blocks does Bob have now after letting his brother play with 54 blocks?'

Back

Bob has 25 blocks left after letting his brother play with 54 blocks.

Tags

CCSS.2.OA.A.1

Front

How do you find the number of items left after giving some away?

Back

To find the number of items left after giving some away, subtract the number given away from the total number of items you had.

Tags

CCSS.2.OA.A.1

Front

What is the result of 81 - 56?

Back

The result of 81 - 56 is 25.

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

If there are 65 geese and 28 flew away, how do you calculate the remaining geese?

Back

To calculate the remaining geese, subtract the number of geese that flew away (28) from the total number of geese (65): 65 - 28 = 37.

Tags

CCSS.2.OA.A.1

Front

What is the importance of understanding regrouping in subtraction?

Back

Understanding regrouping in subtraction is important because it allows students to accurately perform subtraction problems where borrowing is necessary, ensuring correct answers.

Tags

CCSS.7.NS.A.1C