RAPID ADDITION 3 



11. 984338579486346 

 943171564548476 

 ?S5613579496696 



12. 739564534243996 

 634642263425623 

 335169883783396 



13. 3 3 5 6 4 9 3 8 9 -4 7 8 7 5 8 

 224542577673767 



988828987839562 



14. 543228276624583 

 641183129891351 

 393985818874755 



5. The addition of several numbers arranged in vertical 

 columns can be simplified and rendered much easier by 

 thinking only sums. 



EXAMPLE. 35 



46 In adding this column think "17, 24, 30, 35" ; 

 77 and not " 9 and 8 are 17, and 7 are 24, and 6 are 

 68 30, and 5 are 35." 

 29 



ORAL EXERCISE 



Speaking only the sums, add the following : 



