The question asks to find the least possible number that could have been rounded to 670 when rounding to the nearest ten.

Solution:

When rounding to the nearest ten, numbers from 665 to 674 round to 670.

The least possible number within this range is 665, because:

• Any number from 665 to 669 rounds down to 670.
• Any number from 670 to 674 rounds up to 670.

Thus, the least possible number is 665.

Would you like further clarification or details?

Here are 5 related questions:

1. What is the greatest possible number that could round to 670?
2. How do you round numbers to the nearest hundred?
3. What numbers round to 680 when rounded to the nearest ten?
4. If a number rounds to 3000 when rounded to the nearest thousand, what could the number be?
5. How do you determine the range of numbers that round to a specific value?

Tip: To round a number, look at the digit right after the place you're rounding to. If it's 5 or higher, round up; if it's 4 or lower, round down!