Multiplying, dividing, adding, subtracting standard form

Question 1

How would you multiply two standard forms by each other?

Answer 1

collect the like terms: multiply the numbers, then the 10s

Question 2

How would you divide two standard forms by each other?

Answer 2

turn the equation into two fractions:
number one and tens one

Question 3

(810^5) * (410^4)

Answer 3

(84) * (10^510^4)

32*10^9

3.2*10^10

Question 4

(2.410^8) / (210^5)

Answer 4

2.4/2 * 10^8/10^5

1.2*10^3