Hello!
The number is 4.35, which is either between 4 ft or 5 ft. To round it, you need to see whether the number is above 5 or below. If it's over 5, you round up. If it's below 5, you round down.
4.35
Look at the numbers after the decimal point. 35. Since the second digit is 5, we round the 3 to a 4. Making it 4.4
Since 4 is less than 5, you round it down. 4.4 --- 4
So, 4.35 rounded to the nearest ft is 4 ft.
Rounding confuses me, too! :D