# 1.4 Addition of whole numbers

 Page 1 / 2
This module is from Fundamentals of Mathematics by Denny Burzynski and Wade Ellis, Jr. This module discusses how to add whole numbers. By the end of this module, students should be able to understand the addition process, add whole numbers, and use the calculator to add one whole number to another.

## Section overview

• Addition Visualized on the Number Line
• Calculators

Suppose we have two collections of objects that we combine together to form a third collection. For example, We are combining a collection of four objects with a collection of three objects to obtain a collection of seven objects.

The process of combining two or more objects (real or intuitive) to form a third, the total, is called addition .

In addition, the numbers being added are called addends or terms , and the total is called the sum . The plus symbol (+) is used to indicate addition, and the equal symbol (=) is used to represent the word "equal." For example, $4+3=7$ means "four added to three equals seven."

## Addition visualized on the number line

Addition is easily visualized on the number line. Let's visualize the addition of 4 and 3 using the number line.

To find $4+3$ ,

1. Start at 0.
2. Move to the right 4 units. We are now located at 4.
3. From 4, move to the right 3 units. We are now located at 7.

Thus, $4+3=7$ . We'll study the process of addition by considering the sum of 25 and 43.

$\begin{array}{cc}\begin{array}{c}\hfill 25\\ \hfill \underline{+43}\end{array}& \text{means}\end{array}$ We write this as 68.

We can suggest the following procedure for adding whole numbers using this example.

## The process of adding whole numbers

The process:

1. Write the numbers vertically, placing corresponding positions in the same column.

$\begin{array}{c}\hfill 25\\ \hfill \underline{+43}\end{array}$

2. Add the digits in each column. Start at the right (in the ones position) and move to the left, placing the sum at the bottom.

$\begin{array}{c}\hfill 25\\ \hfill \underline{+43}\\ \hfill 68\end{array}$

Confusion and incorrect sums can occur when the numbers are not aligned in columns properly. Avoid writing such additions as
$\begin{array}{c}25\hfill \\ \hfill \underline{+43}\end{array}$
$\begin{array}{c}\hfill \phantom{\rule{16px}{0ex}}25\\ \underline{+43\phantom{\rule{8px}{0ex}}}\hfill \end{array}$

## Sample set a

$\begin{array}{c}\hfill 276\\ \hfill \underline{+103}\\ \hfill 379\end{array}\phantom{\rule{16px}{0ex}}\begin{array}{}6+3=9\text{.}\\ 7+0=7\text{.}\\ 2+1=3\text{.}\end{array}$

$\begin{array}{c}\hfill 1459\\ \hfill \underline{+130}\\ \hfill 1589\end{array}\phantom{\rule{16px}{0ex}}\begin{array}{}9+0=9\text{.}\\ 5+3=8\text{.}\\ 4+1=5\text{.}\\ 1+0=1\text{.}\end{array}$

In each of these examples, each individual sum does not exceed 9. We will examine individual sums that exceed 9 in the next section.

## Practice set a

Perform each addition. Show the expanded form in problems 1 and 2.

88 5,527 267,166

It often happens in addition that the sum of the digits in a column will exceed 9. This happens when we add 18 and 34. We show this in expanded form as follows. Notice that when we add the 8 ones to the 4 ones we get 12 ones. We then convert the 12 ones to 1 ten and 2 ones. In vertical addition, we show this conversion by carrying the ten to the tens column. We write a 1 at the top of the tens column to indicate the carry. This same example is shown in a shorter form as follows: $8+4=12$ Write 2, carry 1 ten to the top of the next column to the left.

## Sample set b

Perform the following additions. Use the process of carrying when needed.

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
hi
Loga
what does nano mean?
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Privacy Information Security Software Version 1.1a
Good
7hours 36 min - 4hours 50 min By Dindin Secreto By IES Portal By Janet Forrester By Stephen Voron By Mary Matera By John Gabrieli By OpenStax By Maureen Miller By Jonathan Long By Brooke Delaney