Now we will consider the four basic operations with whole numbers: addition, subtraction, multiplication, and division.
Adding Whole Numbers
Addition means putting things together. The numbers to be added are called the addends. The total is called the sum. The digits are aligned in columns to ensure that like terms are added. First we add all the numbers in the ones place, then we add all the numbers in the tens place, and so on. Example:
You will need to carry a number whenever the sum of the addends is greater than nine. Example:
Usually, we write the numbers in a column format with ones, tens, hundreds, etc. aligned, then add each column beginning with the ones, and carry-over digits to the left.
Word Problems – Using Whole Numbers
Write your own word problem: