That rounds to zero.
Since 72 is an integer, it is already rounded to the nearest fractional part.
72 to the nearest tens is 70
72 is already "the nearest whole number", no need for any rounding. The answer is: 72.
To round a number, look at the digit to the right of the place you want to round to. If it is 5 or more, change the digit in the place you're rounding to to the next higher digit. If the digit to the right of the place you're rounding to is less than 5, leave the digit in the place you are rounding to as it is. Change all digits to the right of the place you are rounding to to zeros. 72 rounded to the nearest ten is 70.
645 rounded to the nearest ten would simply be 650.
It rounds up, to give 100.
It is 70 when rounded to the nearest 10 because 2 is less than 5
100
the answer is 70 becuase round 72 to the nearest then it will be 70
It is 72.
look at 72. If it is larger than 49, it gets rounded up, and it does, to 300
It is 72 when rounded to the nearest whole number.