Round 1864.29 to the nearest one

It would be 2 because the place of the 1 in the whole number is ones, the 8 is tens the six is hundreds, the 6 is thousands and the four is hundred thousands for the whole number and for the decimal the place of 2 is hundredths and the 9 is tenths.

1864 are numbers in the whole number

.29 are numbers in the decimal place

Since the number to the right of the ones place is a 2 (even if it's a. 2) it is less than 5 so you would have to round down (if it was a 5 or more than you would round up). So the answer is 1864.