# Add the numbers: 67 + 68 + 69 + 48 + 48 + 65 + 59 + 61 + 72 + 68 + 68 + 81 + 75 + 81 + 83 + 84 + 72 + 83 + 73 + 78 = ? Calculate the natural numbers sum and learn how to do the addition, column adding method, from right to left

## The numbers addition to perform: 67 + 68 + 69 + 48 + 48 + 65 + 59 + 61 + 72 + 68 + 68 + 81 + 75 + 81 + 83 + 84 + 72 + 83 + 73 + 78

### Stack the numbers on top of each other.

#### The tens digits line up in the next column to the left.

 6 7 6 8 6 9 4 8 4 8 6 5 5 9 6 1 7 2 6 8 6 8 8 1 7 5 8 1 8 3 8 4 7 2 8 3 7 3 + 7 8 ?

## Add column by column; start from the column on the right.

### Add the digits in the ones column:

#### 1 is the hundreds digit. Carry it over to the hundreds column. But that column does not exist. We will imagine one, to the left of the tens. Write the digit above that column. Add it with the rest of the digits in that column.

 1 0 6 7 6 8 6 9 4 8 4 8 6 5 5 9 6 1 7 2 6 8 6 8 8 1 7 5 8 1 8 3 8 4 7 2 8 3 7 3 + 7 8 3

### Add the digits in the tens column:

#### 1 is the thousands digit. Carry it over to the thousands column. But that column does not exist. We will imagine one, to the left of the hundreds. Write the digit above that column. Add it with the rest of the digits in that column.

 3 1 1 0 6 7 6 8 6 9 4 8 4 8 6 5 5 9 6 1 7 2 6 8 6 8 8 1 7 5 8 1 8 3 8 4 7 2 8 3 7 3 + 7 8 0 3

### Add the digits in the hundreds column:

#### 4 is the hundreds digit. Write it down at the base of the hundreds column.

 3 1 1 0 6 7 6 8 6 9 4 8 4 8 6 5 5 9 6 1 7 2 6 8 6 8 8 1 7 5 8 1 8 3 8 4 7 2 8 3 7 3 + 7 8 4 0 3

### Add the digits in the thousands column:

#### 1 is the thousands digit. Write it down at the base of the thousands column.

 3 1 1 0 6 7 6 8 6 9 4 8 4 8 6 5 5 9 6 1 7 2 6 8 6 8 8 1 7 5 8 1 8 3 8 4 7 2 8 3 7 3 + 7 8 1 4 0 3