**Answer:**

**5. Twelve thousand, three hundred forty-five can be written as 12,345.**

**6. Fifty-three million, eighty-nine thousand, seven hundred two can be written as 53,089,702.**

**7. Two hundred fifty-six thousand, seven hundred eighty can be written as 256,780.**

**8. Eighty-five thousand, nine can be written as 85,009.**

**9. Two hundred thirty-eight thousand, eight hundred fifty-seven miles can be written as 238,857.**

**Step-by-step explanation:**

According to the place value chart:

** Millions Hundred Th. Ten Th Thousands hundreds Tens Ones
**

**
1,000,000 100,000 10,000 1,000 100 10 1**

We can write any number with the help of place value chart:

For example:

8 thousand, seven hundred seventy-five.

8,000+700+75 = 8,775

Now consider the provided information.

**5. Twelve thousand, three hundred forty-five**

This can be written as:

12,000+300+45 = 12,345

**Twelve thousand, three hundred forty-five can be written as 12,345.**

**6. Fifty-three million, eighty-nine thousand, seven hundred two**

This can be written as:

53,000,000+89,000+700+2 = 53,089,702

**Fifty-three million, eighty-nine thousand, seven hundred two can be written as 53,089,702.**

**7. Two hundred fifty-six thousand, seven hundred eighty**

This can be written as:

256,000+780 = 256,780

**Two hundred fifty-six thousand, seven hundred eighty can be written as 256,780.**

**8. Eighty-five thousand, nine**

This can be written as:

85,000+9 = 85,009

**Eighty-five thousand, nine can be written as 85,009.**

**9. Two hundred thirty-eight thousand, eight hundred fifty-seven miles**

This can be written as:

238,000+800+57 = 238,857

**Two hundred thirty-eight thousand, eight hundred fifty-seven miles can be written as 238,857.**