4.2 Plus 21 Addition :

Number 1	Number 2	Answer
4.2	21	25.2

How to calculate 4.2 plus 21 ?

Let's break down the addition of 04.2 and 2100 step by step:

   04.2      <-- Start with the rightmost column
+  2100
---------

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

   04.2
+  2100
---------
     2


    Add the digits in the rightmost column:
        4 + 1 + 0 = 5
        Write down 5 in the rightmost column, carry over 0 to the next column.

   04.2
+  2100
---------
     5.2


    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.

   04.2
+  2100
---------
     25.2

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

The final result is 25.2.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
4.3	27	31.3	4.3 plus 27
4.4	34	38.4	4.4 plus 34
4.5	41	45.5	4.5 plus 41
1	4.2	5.2	1 plus 4.2
9.3	5.4	14.7	9.3 plus 5.4
6.6	7.6	14.2	6.6 plus 7.6