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

Method used below: column adding, from right to left (traditional).


Stack the numbers on top of each other.

The ones digits line up in the first column from the right.

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


   67
   68
   69
   48
   48
   65
   59
   61
   72
   68
   68
   81
   75
   81
   83
   84
   72
   83
   73
+   78

?

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

Add the digits in the ones column:

7 + 8 + 9 + 8 + 8 + 5 + 9 + 1 + 2 + 8 + 8 + 1 + 5 + 1 + 3 + 4 + 2 + 3 + 3 + 8 = 103

How did we add the digits? Explanation below.

Group the ones together in order to make tens:


7 + 8 + 9 + 8 + 8 + 5 + 9 + 1 + 2 + 8 + 8 + 1 + 5 + 1 + 3 + 4 + 2 + 3 + 3 + 8 =


7 + 8 + 9 + 8 + 8 + 5 + 9 + 1 + 2 + 8 + 8 + 1 + 5 + 1 + 3 + 4 + 2 + 3 + 3 + 8 =


(7 + 3) + (8 + 2) + (9 + 1) + (8 + 2) + 8 + (5 + 5) + (9 + 1) + 8 + 8 + 1 + 4 + 3 + 3 + 8 =


10 + 10 + 10 + 10 + 8 + 10 + 10 + 8 + 8 + 1 + 4 + 3 + 3 + 8 =


10 + 10 + 10 + 10 + 8 + 10 + 10 + 8 + 8 + 1 + 4 + 3 + 3 + 8 =


10 + 10 + 10 + 10 + 8 + 10 + 10 + 8 + 8 + 1 + 10 + 8 =


10 + 10 + 10 + 10 + 8 + 10 + 10 + 8 + 8 + 1 + 10 + 8 =


10 + 10 + 10 + 10 + (8 + 1) + 10 + 10 + 8 + 8 + 10 + 8 =


10 + 10 + 10 + 10 + 9 + 10 + 10 + 8 + 8 + 10 + 8 =


10 + 10 + 10 + 10 + 9 + 10 + 10 + 8 + 8 + 10 + 8 =


10 + 10 + 10 + 10 + 9 + 10 + 10 + 2 + 2 + 1 + 3 + 8 + 10 + 8 =


10 + 10 + 10 + 10 + 9 + 10 + 10 + 2 + 2 + 1 + 3 + 8 + 10 + 8 =


10 + 10 + 10 + 10 + (9 + 1) + 10 + 10 + (2 + 8) + (2 + 8) + 3 + 10 =


10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 3 + 10 =


10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 3 + 10 =


(10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10) + 3 =


100 + 3 =


103


Change the order in which the numbers are added, the sum stays the same.
Break some number(s) into component parts, the sum stays the same.


The sum is a three-digit number: 103.


3 is the ones digit.
Write it down at the base of the ones column.


0 is the tens digit.
Carry it over to the tens column.
Write the digit above that column.
Add it with the rest of the digits in that 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.

  10
   67
   68
   69
   48
   48
   65
   59
   61
   72
   68
   68
   81
   75
   81
   83
   84
   72
   83
   73
+   78

    3

Add the digits in the tens column:

6 + 6 + 6 + 4 + 4 + 6 + 5 + 6 + 7 + 6 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 + 0 = 130

How did we add the digits? Explanation below.

Group the ones together in order to make tens:


6 + 6 + 6 + 4 + 4 + 6 + 5 + 6 + 7 + 6 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 + 0 =


6 + 6 + 6 + 4 + 4 + 6 + 5 + 6 + 7 + 6 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 =


(6 + 4) + (6 + 4) + 6 + 6 + 5 + 6 + 7 + 6 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 =


10 + 10 + 6 + 6 + 5 + 6 + 7 + 6 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 =


10 + 10 + 6 + 6 + 5 + 6 + 7 + 6 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 =


10 + 10 + 3 + 3 + 3 + 3 + 4 + 1 + 3 + 2 + 1 + 7 + 2 + 2 + 2 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 =


10 + 10 + 3 + 3 + 3 + 3 + 4 + 1 + 3 + 2 + 1 + 7 + 2 + 2 + 2 + 6 + 8 + 7 + 8 + 8 + 8 + 7 + 8 + 7 + 7 =


10 + 10 + (3 + 7) + (3 + 7) + (3 + 7) + (3 + 7) + (4 + 6) + 1 + (3 + 7) + (2 + 8) + 1 + (2 + 8) + (2 + 8) + (2 + 8) + 8 =


10 + 10 + 10 + 10 + 10 + 10 + 10 + 1 + 10 + 10 + 1 + 10 + 10 + 10 + 8 =


10 + 10 + 10 + 10 + 10 + 10 + 10 + 1 + 10 + 10 + 1 + 10 + 10 + 10 + 8 =


(10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10) + (1 + 1 + 8) =


130 + 0 =


130 =



The sum is a three-digit number: 130.


0 is the tens digit.
Write it down at the base of the tens column.


3 is the hundreds digit.
Carry it over to the hundreds column.
Write the digit above that column.
Add it with the rest of the digits in that 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  
 110
   67
   68
   69
   48
   48
   65
   59
   61
   72
   68
   68
   81
   75
   81
   83
   84
   72
   83
   73
+   78

   03

Add the digits in the hundreds column:

1 + 3 = 4

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


 3  
 110
   67
   68
   69
   48
   48
   65
   59
   61
   72
   68
   68
   81
   75
   81
   83
   84
   72
   83
   73
+   78

  403

Add the digits in the thousands column:

There is a single digit in this column: 1.

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


 3  
 110
   67
   68
   69
   48
   48
   65
   59
   61
   72
   68
   68
   81
   75
   81
   83
   84
   72
   83
   73
+   78

 1403

Answer:

67 + 68 + 69 + 48 + 48 + 65 + 59 + 61 + 72 + 68 + 68 + 81 + 75 + 81 + 83 + 84 + 72 + 83 + 73 + 78 = 1,403

How to add the numbers:
77 + 74 + 77 + 55 + 57 + 70 + 62 + 64 + 74 + 78 + 71 + 87 + 85 + 86 + 87 + 86 + 77 + 90 + 81 + 80 = ?

Addition Calculator: Add Numbers & Learn to Calculate the Sum

1. Stack the numbers on top of each other. 2. Add column by column starting from the column on the right.

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