Please check these problems.

1. 92 X 10^3 km ---> dm
My answer: 9.2 X 10^8 dm

2. 5.52 X 10^8 g ---> kg
My answer: 5.52 X 10^11 kg

3. 8.66 X 10^-9 m ---> mm
My answer: 8.66 X 10^-12 mm

4. 1 um ---> m
My answer: 1 X 10^-6 m

Thanks.

1 and 4 are correct.
No so for 2 and 3.
2.There MUST be fewer kg than g and you have more than you started with.
3. You are going from m to mm. mm is a smaller unit; therefore, there MUST be more mm. You have less.

Let's break down the correct answers for problems 2 and 3:

2. Converting 5.52 x 10^8 g to kg:
To convert grams (g) to kilograms (kg), you need to divide the given value by 1000. Since there are 1000 grams in 1 kilogram, your calculation should be:
5.52 x 10^8 g / 1000 = 5.52 x 10^5 kg

Therefore, the correct answer is 5.52 x 10^5 kg.

3. Converting 8.66 x 10^-9 m to mm:
To convert meters (m) to millimeters (mm), you need to multiply the given value by 1000. Since there are 1000 millimeters in 1 meter, your calculation should be:
8.66 x 10^-9 m x 1000 = 8.66 x 10^-6 mm

Therefore, the correct answer is 8.66 x 10^-6 mm.

So, the corrected answers for problems 2 and 3 are:
2. 5.52 x 10^5 kg
3. 8.66 x 10^-6 mm