Multi-Digit Addition and Subtraction

Multi-digit addition is the process of adding numbers that have more than one digit, aligning the numbers by place value and adding each column from right to left, carrying over any values as necessary.

Multi-digit subtraction is the process of subtracting numbers that have more than one digit, aligning the numbers by place value and subtracting each column from right to left, borrowing from the next column when necessary.

When the sum of a column exceeds 9, you write down the rightmost digit and carry over the leftmost digit to the next column to the left.

When a digit in the top number is smaller than the corresponding digit in the bottom number, you borrow 1 from the next left column, reducing it by 1 and adding 10 to the current column.

The sum is 880,689.

The difference is 3,242.

The result is 3,494.

The result is 4,227.

The sum is 2,158.

Place value is crucial because it determines the value of each digit in a number, ensuring that numbers are aligned correctly for accurate addition or subtraction.