A whole number is added to a number with two didgets after the decimal point. To make sure the answer is reasonable, how many didgets should the sum have after the decimal point ?
A - none
B - 1
C- 2
D- infinitely many
C - 2
To determine how many digits the sum should have after the decimal point, we need to understand what happens when we add a whole number to a number with two digits after the decimal point.
Let's consider an example:
Whole Number: 5
Number with two decimal digits: 3.14
When we add these two numbers together (5 + 3.14), we get 8.14. The sum has the same number of digits after the decimal point as the original number with two decimal digits (3.14).
This example suggests that when we add a whole number to a number with two decimal digits, the sum should have two decimal digits as well.
Therefore, the correct answer is C - 2.