0.006
165,000,000
100,000,000,000,000
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, your example is written in standard form.
The standard form is 4,035,312,004
The standard form is 41,800,000
21.59 in standard form is 2.159 × 101
In standard form it would be written as 3x10^8. In decimal form it would be 300,000,000.
The standard form is 3,329
3,400,000.
75
200,000,000,000
4,600,000
0.012
0.006
165,000,000
60,000