7.8 Plus 4.2 Addition :

Number 1	Number 2	Answer
7.8	4.2	12

How to calculate 7.8 plus 4.2 ?

Let's break down the addition of 7.8 and 4.2 step by step:

   7.8      <-- Start with the rightmost column
+  4.2
---------

    Add the digits in the rightmost column:
        8 + 2 + 1 = 10
        Write down 0 in the rightmost column, carry over 1 to the next column.

   7.8
+  4.2
---------
     0


    Add the digits in the rightmost column:
        7 + 4 + 1 = 12
        Write down 2 in the rightmost column, carry over 1 to the next column.

   7.8
+  4.2
---------
     2.0

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

The final result is 12.0.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
7.9	10.2	18.1	7.9 plus 10.2
8	19.2	27.2	8 plus 19.2
8.1	21.2	29.3	8.1 plus 21.2
1	7.7	8.7	1 plus 7.7
9.9	4.5	14.4	9.9 plus 4.5
7.6	2.1	9.7	7.6 plus 2.1