Question

round 684 to the nearest ten.

Explanation:

Step1: Identify the digit in the ones place

In the number 684, the digit in the ones place is 4.

Step2: Apply the rounding rule for tens place

To round to the nearest ten, we look at the ones digit. If the ones digit is less than 5, we round down; if it is 5 or more, we round up. Since 4 < 5, we keep the tens digit the same and change the ones digit to 0. The tens digit in 684 is 8, so the number rounded to the nearest ten is 680.

Answer:

680