20.78
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The '9' is in the "first decimal" place and the '3' is in the "second decimal" place.Rules for roundingIf the number in the second decimal place is 5 or greater then the number in the first decimal place is rounded upwards by 1.If the number in the second decimal place is 4 or less then the number in the first decimal place is left unchanged.As the problem in this case is 3.93 and the number in the second decimal place is less than 5, we end up with3.9 "correct to one decimal place" or "rounded to one decimal place".
0.135 rounded to two decimal places is 0.14. When rounding to two decimal places, we look at the third decimal place (in this case, 5) and round up if it is 5 or greater. Since the third decimal place is 5 in this instance, we round up the second decimal place from 3 to 4.
When rounding 3.6 to one decimal point, you look at the digit in the second decimal place, which is 6. Since 6 is equal to or greater than 5, you round up the digit in the first decimal place. Therefore, 3.6 rounded to one decimal point is 3.7.
To round 2.818 to the nearest one decimal place, you would look at the digit in the second decimal place, which is 1. Since 1 is less than 5, you would round down. Therefore, 2.818 rounded to the nearest one decimal place is 2.8.
When rounding 1.049 to the hundredths place, you look at the third decimal place, which is 9. Since 9 is equal to or greater than 5, you round up the second decimal place. Therefore, 1.049 rounded to the hundredths place is 1.05.