Find the value of 2.2 + 4.08 + 3.125 + 6.3755.

Explanation

Out of all the numbers 2.2 has got the least number of decimal places- one.
Hence we should retain only two decimal places in the remaining numbers. Hence 4.08 remains as it is 3.125 is to be rounded off as 3.12 (as 2 before 5 is even) 6.3755 is to be rounded off as 6.38 (as 7 before 5 is odd). Now adding 2.2 + 4.08 + 3.12 + 6.38 =15.78 `.
Finally we should have only one decimal place and hence 15.78 is to be rounded off as 15.8 .