Learn How To Add Whole Numbers
Let's talk in some details about Adding Whole 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 Example How To Add Whole Numbers With Carry
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.