8.4 Plus 420.9 Addition :

Number 1	Number 2	Answer
8.4	420.9	429.3

How to calculate 8.4 plus 420.9 ?

Let's break down the addition of 008.4 and 420.9 step by step:

   008.4      <-- Start with the rightmost column
+  420.9
---------

    Add the digits in the rightmost column:
        4 + 9 + 1 = 13
        Write down 3 in the rightmost column, carry over 1 to the next column.

   008.4
+  420.9
---------
     3


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

   008.4
+  420.9
---------
     9.3


    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.

   008.4
+  420.9
---------
     29.3


    Add the digits in the rightmost column:
        0 + 4 + 0 = 4
        Write down 4 in the rightmost column, carry over 0 to the next column.

   008.4
+  420.9
---------
     429.3

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

The final result is 429.3.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
8.5	428.9	437.4	8.5 plus 428.9
8.6	429.9	438.5	8.6 plus 429.9
8.7	438.9	447.6	8.7 plus 438.9
3.8	3.9	7.7	3.8 plus 3.9
5	4.9	9.9	5 plus 4.9
9.3	3.8	13.1	9.3 plus 3.8