8.9 Plus 121 Addition :

Number 1	Number 2	Answer
8.9	121	129.9

How to calculate 8.9 plus 121 ?

Let's break down the addition of 008.9 and 12100 step by step:

   008.9      <-- Start with the rightmost column
+  12100
---------

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

   008.9
+  12100
---------
     9


    Add the digits in the rightmost column:
        8 + 1 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   008.9
+  12100
---------
     9.9


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

   008.9
+  12100
---------
     29.9


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

   008.9
+  12100
---------
     129.9

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

The final result is 129.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
9	129	138	9 plus 129
9.1	136	145.1	9.1 plus 136
9.2	144	153.2	9.2 plus 144
9.9	1.9	11.8	9.9 plus 1.9
2	5.4	7.4	2 plus 5.4
8.7	7.7	16.4	8.7 plus 7.7