Comparing with Scientific Notation

Place the following numbers in order from least to greatest:
7.8 x 10⁶,    5.1 x 10⁴,  
1.25 x 10⁵,    4.09 x 10⁴

• 4.09 x 10⁴,  
  1.25 x 10⁵,    
  5.1 x 10⁴,  
  7.8 x 10⁶,
• 4.09 x 10⁴,    
  5.1 x 10⁴,    
  1.25 x 10⁵,  
  7.8 x 10⁶, 
• 1.25 x 10⁵,  
  4.09 x 10⁴,    
  5.1 x 10⁴,    
  7.8 x 10⁶,  

Which of the following numbers is the least?

• 7 x 10⁸
• 7.1 x 10⁸
• 7 x 10⁹
• 7.1 x 10⁹

The diameter of the planet Mercury is
4.87 x 10³ km.  The diameter of the planet Venus is 1.21 x 10⁴ km. The diameter of the planet Mars is 
1.28 x 10³ km.   
Which planet has the smallest diameter?

• Mercury
• Mars
• Venus

Order the following from greatest to least:
 5 x 10³ 
 3.2 x 10⁸
 1.2 x 10⁸
 7 x 10⁵ 

•  7 x 10⁵ ,  5 x 10³ ,
   3.2 x 10⁸,  1.2 x 10⁸
•  3.2 x 10⁸, 1.2 x 10⁸,  7 x 10⁵, 5 x 10³ 
•  1.2 x 10⁸, 3.2 x 10⁸,
   5 x 10³ , 7 x 10⁵ 

Which of these number is the least?

• 3.5 x 10⁷
• 5 x 10⁷
• 3 x 10⁷
• 5.5 x 10⁷

Which of these numbers is greatest?

•  9 x 10⁹ 
•  8 x 10⁹ 
•  9 x 10⁸ 
•  8 x 10⁸ 

Which of these numbers is the greatest?

• 5.406 x 10⁸
• 5.504 x 10⁷
• 5.604 x 10⁹
• 6.504 x 10⁸

Which of these numbers is the least?

• 9 x 10⁴
• 1.2 x 10⁵
• 3.01 x 10⁹
• 1.901 x 10⁴