我想問round off同round up要點，可舉例子嗎？

Q1. Round off the number 6.7277 to two decimal places.
6.7277 以小數點二位數之進位.
A1. 6.73.
Q2. How to round off 290.90 to meet multiple of 10?
290.90 以十整數之進位為多少?
A2. 290.90 ==> 290
291.00 ==> 290
295.00 ==> 300
299.00 ==> 300
Q3. When it’s a 5, do you round up or down
5是進位或捨去
A3. 1.2.3.4 捨去(round down)、5.6.7.8.9進位(round up) ==> 四捨五入)