Addition and Subtraction

Front

What is addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total or sum.

Front

What is subtraction?

Back

Subtraction is the mathematical operation of taking one number away from another to find the difference.

Front

What is the sum of two numbers?

Back

The sum is the result of adding two or more numbers together.

Front

What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another.

Front

How do you perform addition with large numbers?

Back

Align the numbers by their rightmost digits and add each column, carrying over any value greater than 10 to the next column.

Front

How do you perform subtraction with large numbers?

Back

Align the numbers by their rightmost digits and subtract each column, borrowing from the next column if necessary.

Front

What is a carry in addition?

Back

A carry occurs when the sum of a column exceeds 9, and the excess is carried over to the next column.

Front

What is borrowing in subtraction?

Back

Borrowing is a technique used in subtraction when the top digit is smaller than the bottom digit in a column, requiring a value to be borrowed from the next column.

Front

What is the result of 100 + 250?

Back

The result is 350.

Front

What is the result of 500 - 275?

Back

The result is 225.