Yes, it is.
.22 is closer to zero than to one.
Rounding to the nearest whole number, it is 22.
22 is a whole number. Whole numbers can't be mixed numbers.
21.98 rounded to the nearest whole number is 22
22
21.635 to the nearest whole number is 22
22 is a whole number and cannot be a decimal.
It is 22.
22.
21.5 to the nearest whole number is 22. When rounding a decimal number to the nearest whole number, you look at the digit to the right of the decimal point. If it is 5 or greater, you round up to the next whole number. In this case, 21.5 has a digit of 5 in the tenths place, so it rounds up to 22.
It is: 22
22