4.2 Plus 8.7 Addition :

Number 1	Number 2	Answer
4.2	8.7	12.9

How to calculate 4.2 plus 8.7 ?

Let's break down the addition of 4.2 and 8.7 step by step:

   4.2      <-- Start with the rightmost column
+  8.7
---------

    Add the digits in the rightmost column:
        2 + 7 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   4.2
+  8.7
---------
     9


    Add the digits in the rightmost column:
        4 + 8 + 1 = 12
        Write down 2 in the rightmost column, carry over 1 to the next column.

   4.2
+  8.7
---------
     2.9

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

The final result is 12.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
4.3	16.7	21	4.3 plus 16.7
4.4	21.7	26.1	4.4 plus 21.7
4.5	29.7	34.2	4.5 plus 29.7
6.7	8.8	15.5	6.7 plus 8.8
6	7.5	13.5	6 plus 7.5
9.6	5.4	15	9.6 plus 5.4