ADDITION OF VULGAR FRACTIONS. 73 



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gers to those of the same j and all of them to a common 

 denominator ; then the sum of the numerators, written 

 over- the common denominator, will be the sum of the 

 fractions required. 



EXAMPLES. 



1. Add 3|-, -f, y of I and 7, together. 



First3X=vMof^zz^,7=f 



Then the fractions are */ , |-, 7^ and f ; .% 



29X8X10X 1 = 2320 



7X8X loX 1= 560 



7X8X 8X 1= 448 



7X8X 8X10 = 4480 



7808 



-= 1 2^11 = 1 2f the answer. 



8X8X10X 1= 640. 

 2. Add |-, 7y and |- of -I together.' Ans. 8-|-. 



q. What is the sum of -|-j 4- of 4 and 9-^ .? Ans. ic-^. 



4. What is the sum of -^- of 6|-, y oi ~ and 74 ? 



Ans. I3i£l. 



5. Add ~1. -^s. and ^V ^^ ^ penny together. 



Ans. mf» or 3s.. Id. 1-1^9. 



6. What is the sum of ~ of 15L 3-|-l. \ of \ oi \ of a 

 pound and y of -|- of a shilling .'' 



Alls. 7L 17s. 54d. 



7. Add y of a yard, \ of a foot and -|- of a mile to- 

 gether, Ans. 660yds. 2ft. pin. 



8. Add ^ of a week, -^ of a day and \ of an hour to- 

 gether. - Ans. -ad. I4^h. 



Subtraction 



ence, may then be as .properly expressed, by the sum or difference 

 of tlie numerators, as the sum or difference of fey two quantities 

 whatever, by the sum or difference of their individuals ; v/hcriCC 

 the reason of the rules, both for addition and subtracfi'On, is 

 manifest, 



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