10 FUNDAMENTAL PEOCESSES 



EXERCISE 



1. When gingham sells at 8J$ per yard, what will be the 

 cost of 5yd.? 7yd.? 9yd.? 4yd.? 10yd.? 



2. When lard sells at 16f$ per pound, what will be the 

 cost of 3 lb.? 51b.? 91b.? 



3. When sugar sells at 6J$ per pound, what will be the 

 cost of 8 lb.? 71b.? 61b.? 



4. When ribbon sells at 12^$ per yard, what will be the 

 cost of 3yd.? 5yd.? 8yd.? 9yd.? 



12. Memorize the following table of important equal parts 

 of 100 : 



13. The following short methods of multiplication are 

 useful. 



(1) To multiply any whole number by 10, annex a cipher 

 to the number ; if a decimal or mixed number is to be mul- 

 tiplied by 10, move the decimal point in the number one 

 place to the right. 



EXAMPLE. 368 x 10 = 3680. 



37.56 x 10 = 375.6. 



ORAL EXERCISE 



Name rapidly the products of the following numbers 

 when multiplied by 10 ; by 100. 



1. 89. 6. 285. 11. 87.5. 16. 8.57. 



2. 76. 7. 8362. 12. 38.7. 17. .26. 



3. 47. 8. 9761. 13. 7.5. 18. .07. 



4. 165. 9. 650. 14. .6. 19. .0387. 



5. 379. 10. 80. 15. .16. 20. 1.02. 



