Grade 4 - Progress in Mathematics

Estimate mentally. Then find the difference.

1. 
   
   
   
   2. 
      
      
      
      3. 
         
         
         
         4. 
            
            
            
            5. 
               
            
            
            
            
         
         
         
         
      
      
      
      
   
   
   
   


2. 
   
   
   
   7. 
      
      
      
      8. 
         
         
         
         9. 
            
         
         
         
         
      
      
      
      
   
   
   
   


3. 
   
   
   
   11. 
       
       
       
       12. 
           
           
           
           13. $ 50.00
               
               9.64
           
           
           
           
       
       
       
       
   
   
   
   

$ 6.04


 4.73

4000


 998

300


 37

2000


 79

7000


 6291

3050


 659

6000


 5783

900


 527

700


 659

400


 281

8070


 691

500


 374

Align and subtract.

14. 100
    69 15. 400
    184 16. $ 5.00
    $ 2.38


15. 8000
    788 18. 6000
    4893 19. $ 70.00
    $19.45


16. 806
    447 21. $ 9.00
    $ 5.41 22. $ 1.05
    $.88


17. 9002
    7865 24. 5000
    718 25. $ 40.00
    $16.95


18. At camp, Mel logged
    2005 minutes on the computer.
    Pam logged 978 minutes
    the first week and twice as
    many minutes the second
    week. Who logged more
    minutes? How many more?


19. In the first month of camp, 1006 e-mails were sent
    and received by the campers. In the second month
    of camp, 677 e-mails were sent and received. About
    how many fewer e-mails were sent and received the
    second month of camp?
    27. The camp director bought a
    new laptop for $875.69. She
    also bought a case of blank
    CDs for $29.95. She gave the
    cashier one thousand dollars.
    How much change did she get?


20. Explain in your Math Journal why you gave an estimated
    or an exact answer for problems 26–28.

8204-6_112-113 11/17/05 8:18 AM Page 113