RULES FOR ROUNDING OFF

(A more statistical approach)

I. When the first digit of those to be dropped is less than 5,

leave the preceding digit unchanged.

Ex. The number 56.748 rounded off to the nearest 0.1 becomes 56.7.

II. If the first digit of those to be dropped is greater than 5,

raise the preceding digit by 1.

Ex. The number 2.146 rounded off to the nearest 0.01 becomes 2.15.

III. If the first digit of those to be dropped is 5 and:

a. If any nonzero digits follow the 5, raise the preceding digit by 1.

Ex. The number 21.4501 rounded off to the nearest 0.1 becomes 21.5.

b. If no nonzero digits follow the 5 and

1. the preceding digit is odd, raise the preceding digit by 1.

Ex. The number 21.350 rounded off to the nearest 0.1 becomes 21.4.

2. the preceding digit is even, leave the preceding digit unchanged.

Ex. The number 21.45 rounded off to the nearest 0.1 becomes 21.4.