Question

round 243 to the nearest ten.

Explanation:

Step1: Identify the tens and ones place

In 243, the tens digit is 4 and the ones digit is 3.

Step2: Apply rounding rule

For rounding to the nearest ten, we look at the ones digit. If the ones digit is less than 5, we round down (keep the tens digit the same and set ones digit to 0). Since 3 < 5, we round 243 down to the nearest ten.
So, 243 rounded to the nearest ten is 240.

Answer:

240