8.4 Plus 420 Addition :

Number 1	Number 2	Answer
8.4	420	428.4

How to calculate 8.4 plus 420 ?

Let's break down the addition of 008.4 and 42000 step by step:

   008.4      <-- Start with the rightmost column
+  42000
---------

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

   008.4
+  42000
---------
     4


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

   008.4
+  42000
---------
     8.4


    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
+  42000
---------
     28.4


    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
+  42000
---------
     428.4

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

The final result is 428.4.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
8.5	422	430.5	8.5 plus 422
8.6	423	431.6	8.6 plus 423
8.7	428	436.7	8.7 plus 428
0.8	3.2	4	0.8 plus 3.2
2.1	1.3	3.4	2.1 plus 1.3
9.6	1.6	11.2	9.6 plus 1.6