7.7 Plus 420.9 Addition :

Number 1	Number 2	Answer
7.7	420.9	428.6

How to calculate 7.7 plus 420.9 ?

Let's break down the addition of 007.7 and 420.9 step by step:

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

    Add the digits in the rightmost column:
        7 + 9 + 1 = 16
        Write down 6 in the rightmost column, carry over 1 to the next column.

   007.7
+  420.9
---------
     6


    Add the digits in the rightmost column:
        7 + 0 + 0 = 8
        Write down 8 in the rightmost column, carry over 0 to the next column.

   007.7
+  420.9
---------
     8.6


    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.

   007.7
+  420.9
---------
     28.6


    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.

   007.7
+  420.9
---------
     428.6

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

The final result is 428.6.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
7.8	426.9	434.7	7.8 plus 426.9
7.9	427.9	435.8	7.9 plus 427.9
8	436.9	444.9	8 plus 436.9
4.9	0.3	5.2	4.9 plus 0.3
3.7	5	8.7	3.7 plus 5
9.9	3.3	13.2	9.9 plus 3.3