Answer: See explanation
Step-by-step explanation:
You didn't give the options but let me help out.
Let's say the numbers we have are:
a. 747,234
b. 770,658
When we want to round up to the hundred thousand places, we consider the digit that is in the ten thousand place. If the digit is greater than or equal to 5, we round and it's lesser than 5, we round down. For example:
A. 747,234
The digit in the hundred thousand place is 7 while the digit in the ten thousand place is 4. Since 4 is less than 5, rounding it down will then be 700,000.
B. 770,658
The digit in the hundred thousand place is 7 while the digit in the ten thousand place is 7. Since 7 is greater than 5, rounding it up will then be 800,000.
Round 685,135 to the nearest ten thousand.
The digit in the ten thousand place is 8 while the digit in the thousand place is 5. Since this is 5, we round it up. This will then be 690,000.