I am very confused with rounding off numbers. How do you know how many zeroes shall you put when you retain?

Answer 1

Rounding to nearest

Thousand = 1000
hundred = 100
ten = 10
ones = 1
tenth = .1
hundredth = .01
thousandth = .001

Do not retain any zeros after the decimal value indicated by 1.

I hope this helps.

Answer 2

How do I round 1.20 to the nearest hundredth?

Answer 3

100