Question 328018
So first you need to understand what the hundredth place and the tenth place are.  The tenths place is the first number after the decimal, and the hundreth place is the second number after the decimal.  For example, if you have the number 0.23, the two is in the tenths place and the 3 is in the hundreth place.
Problem (a):
We wish to round 0.3333 to the nearest hundredth place. That means we only want two digits to appear after the decimal point. When rounding off 0.3333, look at the digit in the place directly to the right of the hundreth place (the thousandth place). Check to see if the digit in the thousandth place is 5 or greater or less than 5. In this case the digit in the thousandth place is a 3, therefore we round down, meaning we leave the number in the hundredth place as is and drop off the rest of the decimal digits.
So 0.3333 to the nearest hundreth is 0.33.
Problem (b):
We wish to round 8.394 to the nearest tenth place.  That means we only want one digit to appear after the decimal point. To round, again look at the digit in the place directly to the right of the tenth place (the hundredth place). Check to see if this digit is 5 or greater, or less than 5.  In this case, the number is a 9 (greater than 5) so we round up, which means we add one to the tenths place digit and drop the rest of the decimal digits.
So 8.394 to the nearest tenth is 8.4.