58.311 will round <em>down </em>since 0.311 is less than half or 0.5. It will become 58. 49.35 will also round <em>down </em>since 0.35 is less than 0.5. This will be 49. 58+49=107. Since 107 is not the exact answer, you will use the approximately sign, or ≈.