Sometimes it is advantageous to express a value in round numbers. To round to a particular place, look at the digit immediately to the right of the one you want to round to, in this case, the tenths place. If that digit is 4, 3, 2, 1 or 0, zero it and everything to the right of it out. If that digit is 5, 6, 7, 8 or 9, increase your target digit by one and zero everything to the right of it out. If your target digit is 9, it will become a zero and increase the digit to the left of it by one.
6,453,321.9648 rounded to the nearest unit or whole number is 6,453,322
4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.
7.5 rounds to:10 to the nearest ten8 to the nearest whole number/unit
4.1 is approximate to:0 to the nearest ten4 to the nearest whole number/unit
29.1 is approximate to0 to the nearest hundred30 to the nearest ten29 to the nearest whole number/unit
226.08 round to the nearest whole unit is 226
6,453,321.9648 rounded to the nearest unit or whole number is 6,453,322
4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.4 is an integer and so already rounded to a whole unit so to round to the nearest tenth you do nothing.
7.5 rounds to10 to the nearest ten8 to the nearest whole number/unit
9.3 rounds to:10 to the nearest ten9 to the nearest whole number/unit
7.5 rounds to:10 to the nearest ten8 to the nearest whole number/unit
4.1 is approximate to:0 to the nearest ten4 to the nearest whole number/unit
9.7 is approximate is10 to the nearest ten10 to the nearest whole number/unit
15.5 is approximate to0 to the nearest hundred20 to the nearest ten16 to the nearest whole number/unit
79.9 is approximate to:100 to the nearest hundred80 to the nearest ten80 to the nearest whole number/unit
29.1 is approximate to0 to the nearest hundred30 to the nearest ten29 to the nearest whole number/unit
46.4 is approximate to0 to the nearest hundred50 to the nearest ten46 to the nearest whole number/unit