Convert these numbers between standard form and normal numbers

Question 1:

4.7× 10 5
470000

Question 2:

4.68× 10 3
4680

Question 3:

9.57× 10 -2
0.0957

Question 4:

734000
7.34× 10 5

Question 5:

7500
7.5× 10 3

Question 6:

0.000649
6.49× 10 -4