Maths Question 要列明步驟 =]

1. Estimate the value of the numberical expression 308.8 - 5.9513 / 0.02038 by first rounding off each number to 1 sig. fig.

2. Give a four-digit odd number which is greater than 9000 and is divisible by 13. When rounded off to 3 sig.fig., it is divisible by 4. When rounded off to 2 sig. fig., it is divisible by 11. Find the number.

要列明步驟 =] THX.. =)