Addition and Subtraction

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

Front

What is the sum of 100 and 50?

Back

150

Front

What is the difference between 100 and 50?

Back

50

Front

What does it mean to find the difference?

Back

Finding the difference means calculating how much one number is greater or less than another.

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals, used to represent numbers visually.

Front

How do you add two large numbers?

Back

Align the numbers by their rightmost digits and add each column starting from the right, carrying over if necessary.

Front

How do you subtract two large numbers?

Back

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

Front

What is regrouping in addition?

Back

Regrouping in addition is when you carry over a value to the next column when the sum exceeds 10.

Front

What is borrowing in subtraction?

Back

Borrowing in subtraction is when you take 1 from the next column to help subtract when the top number is smaller.