Example Of Adding Whole Numbers
Learn How To Add Numbers
Let's talk in some details about adding numbers in real life. If you have 99 pennies,
you need one more penny to make a $1.00. Now you find one penny on side walk. You
have 100 pennies or one dollar ($1.00). Now let's take the next step and show mathematically how
to do what we just talked about.
Detailed Instructions How To Do Addition
Step 1
First, state the problem. We have 99 pennies and want to add 1 penny to the 99.

Columns
CBA
99
+1
_{———}

Step 2
Next we add the numbers in column A: 9 + 1 which is 10. From 10 bring the right
most number down (0) in column A and regroup / carry the (1) from the 10
to column B.

Columns
CBA
1
99
+1
_{———}
0

Step 3
Now add the regrouped/carried 1 in column B to the 9 in column B. Again you get
10. Place the 0 from ten in column B of the answer and carry the 1 of the ten to
column C (this is called carry addition or regroup addition).

Columns
CBA
1
99
+1
_{———}
00

Step 4
The third and last column, C, has only 1 which was carried in the Step 3 math operation.
The final problem answer is 100 pennies or $1.00.

Columns
CBA
99
+1
_{———}
100

To make all of this much clearer, try our First Grade Addition Calculator. It provides
detailed answers to a math problem of your choice with step by step detailed explanations.
If this is to easy for you, there is a link to the next higher level of addition.