Convert these numbers between standard form and normal numbers

Question 1:

1.34× 10 5
134000

Question 2:

7.73× 10 3
7730

Question 3:

7.89× 10 -1
0.789

Question 4:

51700
5.17× 10 4

Question 5:

2110
2.11× 10 3

Question 6:

0.0721
7.21× 10 -2