49) 7/5
1+1/(2+1/2)
2/1+1/2=5/2
1/(5/2)= 2/5
1+(2/5)= 7/5
50)13/3
3+(1/2)+((1+(1/4))/(2-(1/4)))
1+(1/4)=5/4
2-(1/4)=3/2
(5/4)/(3/2)=5/6
3+(1/2)+(5/6)=13/3
51) 39/10
((3/5)/5)+ (3/(4/5))
((3/4)/(5/1))+((3/1)/(4/5))
(3/4)•(1/5)+(3/1)•(5/4)
(3/20)+(15/4)
(3/20)+(75/20)
(78/20)=39/10
52)89/40g
((5/8)/(g))+((8/g)/(5))
(5/8)•(1/g)+(8/g)•(1/5)
(5/8g)+(8/5g)
(25/40g)+(64/40g)=89/40g
