By 3.14 I assume you mean Pi?
Pi rounded to the fourth place past the decimal place is 3.1415
Pi can be found by dividing a circle's circumference by its diameter. It's one of the few non-repeating, non-terminating decimal numbers in math.
16 cents
It is an irrational number and rounds to 5.66 to the nearest hundredths
64.97 is 65.0 to the nearest tenth. It's important to write it as 65.0 (rather than just 65) to show that it is accurate to one decimal place.
It is already at that, so it can be written as: 32.6 To show it as having a hundredths place specifically, though it won't change the value, it can be written as: 32.60
One fourth is 25 out of 100.
16 cents
266.0
295.0
It is an irrational number and rounds to 5.66 to the nearest hundredths
2810000 is already rounded to the nearest tenth. If you need to show that it is rounded to the nearest tenth you would need to write it as 2810000.0
170
It is 8.0 : the trailing 0 is necessary to show that it has been rounded to the nearest tenths.
It is rounded to the nearest thousandth so runding to the nearest millionth makes no difference. If you want to show that the number is ACCURATE to the nearest millionth, you could write it as: 4.613000
You do not, but you can add zeros to pad the decimal to show the hundred thousandths place.
You do not need to do anything. However, in order to SHOW that the number is to the nearest thousandths you may wish to write it as 0.750
64.97 is 65.0 to the nearest tenth. It's important to write it as 65.0 (rather than just 65) to show that it is accurate to one decimal place.
Neighbouring millions are 7 million and 8 million. Subtraction will show that the second of these is much nearer.