Question

estimate $12 \times 485$. first, round each factor. $12$ rounds to $?$. $485$ rounds to $?$.

Explanation:

Step1: Round 12 to nearest ten

12 is closer to 10 than 20, so $12 \approx 10$

Step2: Round 485 to nearest hundred

485 is closer to 500 than 400, so $485 \approx 500$

Answer:

12 rounds to 10. 485 rounds to 500.