21 Plus 669.9 Addition :

Number 1	Number 2	Answer
21	669.9	690.9

How to calculate 21 plus 669.9 ?

Let's break down the addition of 02100 and 669.9 step by step:

   02100      <-- Start with the rightmost column
+  669.9
---------

    Add the digits in the rightmost column:
        0 + 9 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   02100
+  669.9
---------
     9


    Add the digits in the rightmost column:
        0 + 0 + 0 = 0
        Write down 0 in the rightmost column, carry over 0 to the next column.

   02100
+  669.9
---------
     09


    Add the digits in the rightmost column:
        1 + 9 + 1 = 10
        Write down 0 in the rightmost column, carry over 1 to the next column.

   02100
+  669.9
---------
     009


    Add the digits in the rightmost column:
        2 + 6 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   02100
+  669.9
---------
     9009


    Add the digits in the rightmost column:
        0 + 6 + 0 = 6
        Write down 6 in the rightmost column, carry over 0 to the next column.

   02100
+  669.9
---------
     69009

    Continue to the left:
        There are no more columns to the left.

The final result is 69009.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
21.1	673.9	695	21.1 plus 673.9
21.2	676.9	698.1	21.2 plus 676.9
21.3	683.9	705.2	21.3 plus 683.9
4.6	0.9	5.5	4.6 plus 0.9
1.6	1.2	2.8	1.6 plus 1.2
8.9	9.4	18.3	8.9 plus 9.4