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.






Addition Concept

What is Addition

Adding Whole Numbers 1

Adding Whole Numbers 2

Adding Whole Numbers 3

Rounding Whole Numbers

Estimating sums of Whole Numbers

Properties of Addition

The Associative Property of Addition



Word Problems – Using Whole Numbers 

Word problems vocabulary

Operations_W   Operations Writing

WN04  Adding Whole Numbers 1

WN05  Adding Whole Numbers 2

WN06  Find the Missing_Addends

WN43     Add and subtract whole numbers


Write your own word problem:

Word problem Writing Template

Problem Solving Format

Frayer template

Properties of addition