Question

round 12.231 to the nearest tens.

Explanation:

Step1: Identify tens place digit

The tens digit in 12.231 is 1, representing $1\times10=10$.

Step2: Check ones place digit

The ones digit is 2, which is less than 5.

Step3: Round down to nearest ten

Since the ones digit <5, we keep the tens digit and set lower digits to 0.

Answer:

10