3.455 round off to the nearest tenths

3.46

Nancy rounded off to nearest hundredths - 3.5.

3.4

To round off a number to the nearest tenths, you need to look at the digit in the hundredths place, which is the first decimal place after the decimal point.

In this case, the digit in the hundredths place is 5. Since 5 is greater than or equal to 5, you need to round up the digit in the tenths place, which is 4, to the next higher number.

Therefore, rounding off 3.455 to the nearest tenths gives you 3.5.