Can some one please tell me the rules to rounding off the digits? I am having confusion on how to round of to nearest digits.
say 1.485 -> rounded to nearest hundredths and nearest tenths
Sure! Let's think about rounding. If I am rounding to a particular place, I only must consider the place to the right of the place we are interested in. For example, if I have 650 and am rounding to the nearest hundred, I consider the tens place. It has a 5, and I round up with a 5. So I round 650 to 700.
If I am rounding 43 to the tens place, I consider the ones place. It has a 3, so I round down. 43 rounds to 40.
Now, let's look at this one. "tenths" is the place to the right of the point (the 4 is there); "hundredths" is two places to the right (the 8 is there). The 5 is in the thousandths place.
Let's round 1.485 to the tenths place. We only need to consider the number in the hundredths place, 8. Round up. 1.485 rounds to 1.5.
Now let's round 1.485 to the hundredths place. We must consider the number in the thousandths place, 5. Round up. 1.485 rounds to 1.49.
Please let me know if I can offer further clarification.