Writing ordinary numbers II

This task is about writing standard form number into ordinary numbers.
 
The following facts have numbers written in standard form.
Write each of these numbers as a decimal number.
 
a)
A truck driver does a return trip from Wellington to Auckland every week.
In a year he travels approximately 6.7 × 104 km
 
= ________________________________________ km.
 

 
b)
The distance from Earth to the Moon is approximately
3.84 × 105 km.
 
= ________________________________________ km.
 

c)
The number of seconds in a century is approximately 3.155 × 109 seconds.
 
= ________________________________________ seconds.
 

 


 
d)  
The world 100 metre running record was broken by 2 × 10-2 seconds.
 
= ________________________________________ seconds.
 
e)   
The thickness of a page in a mathematics textbook is roughly 7.6 × 10-5 m.
 
= ________________________________________ m.