Adding and Subtracting with regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is when you combine numbers that exceed 10 and carry over to the next place value. For example, in 27 + 15, you add 7 and 5 to get 12, so you write down 2 and carry over 1 to the next column.

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is when you borrow from the next place value to subtract a larger digit from a smaller digit. For example, in 52 - 27, you borrow 1 from the 5 to make the 2 a 12, allowing you to subtract 7 from 12.

Front

What is the difference between addition and subtraction?

Back

Addition is combining numbers to find a total, while subtraction is taking one number away from another to find the difference.

Front

How do you find the difference of 536 - 1?

Back

The difference is 535.

Front

How do you find the difference of 538 - 1?

Back

The difference is 537.

Front

How do you find the difference of 283 - 1?

Back

The difference is 282.

Front

What is the first step in adding two-digit numbers with regrouping?

Back

The first step is to add the digits in the ones place. If the sum is 10 or more, regroup by carrying over to the tens place.

Front

What is the first step in subtracting two-digit numbers with regrouping?

Back

The first step is to check if you can subtract the digits in the ones place. If the top digit is smaller, you need to regroup.

Front

What does it mean to carry over in addition?

Back

Carrying over means to move a value from one column to the next when the sum exceeds the base value (like 10 in base 10).

Front

What does it mean to borrow in subtraction?

Back

Borrowing means to take 1 from the next higher place value to make the current digit larger so you can subtract.