You just take the second decimal place, if its 5 or more then add one to the first decimal, if it's 4 or below then leave the second decimal as is. Then write out the number and leave in only the first decimal place that you may have or may not have changed. In this case it's 16.2
round 0.2975 to 1 decimal place = 0.3
It is then 31.2 when rounded to 1 decimal place
6.5- you round it until it has one decimal.
4.96432 rounded to 1 decimal place is 5.0.
3.3 rounded to 1 decimal place is 3.0.
It is 4.1 when rounded to 1 decimal place
Go to the second decimal place; if it is less than 5; round down. If it is 5 or greater, round up. So, 1.51 rounded to 1 decimal place is 1.5.
To round 4.21 to 1 decimal place, you look at the digit in the second decimal place, which is 1. Since 1 is less than 5, you keep the digit in the first decimal place the same, which is 2. Therefore, rounding 4.21 to 1 decimal place gives you 4.2.
because
6.32 rounded to 1 decimal place = 6.3
334.4 is already in 1 decimal place
To one decimal place it is rounded to 0.9