Final answer:
To round 167,890 to the nearest hundred thousand, observe the tens of thousands digit. Since it's less than 5, the number rounds down to 100,000.
Step-by-step explanation:
To round off 167,890 to the nearest hundred thousand, we need to look at the tens of thousands place, which is 6 in this case. Since this digit is less than 5, we round down, meaning that the number stays the same until the hundred thousand place. The correct rounded number is 100,000.
To put this into context with an example, if we had a number like 250,000 and we wanted to round to the nearest hundred thousand, we would round up to 300,000 because the tens of thousands place (5) is equal to or greater than 5.