Answer:
A) ![\huge\boxed{3.9}](https://tex.z-dn.net/?f=%5Chuge%5Cboxed%7B3.9%7D)
B) ![\huge\boxed{5.42}](https://tex.z-dn.net/?f=%5Chuge%5Cboxed%7B5.42%7D)
C) ![\huge\boxed{125}](https://tex.z-dn.net/?f=%5Chuge%5Cboxed%7B125%7D)
Step-by-step explanation:
A) 3.892
To round off to nearest tenth, we'll see the digit in hundredths place. If it is greater than 5 or equal to 5, 1 will be added to the tenths place. If it's not, it will remain the same.
<u>So, it will be like:</u>
=> 3.9
B) 5.424
To round off to nearest hundredth, we'll see the digit in thousandths place. If it is greater than 5 or equal to 5, 1 will be added to the hundredths place. If it's not, it will remain the same.
<u>So, it will be like:</u>
=> 5.42
C) 124.62
To round off to nearest whole number, we'll see the digit in tenths place. If it is greater than 5 or equal to 5, 1 will be added to the ones place. If it's not, it will remain the same.
<u>So, it will be like:</u>
=> 125