Question

EFECTUA: ( OPERACIONES CON FRACCIONES )
a) 3/7 + -5/4
b) 3/20 - 5/12
c) 2/3 - (1/2 - 1/3)
d) 2 - (- 1/3 ) + 2/ 5

Answer 1

a= 3/7 -5/4. = (12-35)/28 = -23/28
b= (9-25)/60= -16/60 =-4/15
c= 2/3 -((3-2)/6)= 2/3 -1/6 = (4-1)/6 = 1/2
d= 2 + 1/3 + 3/5 = (30+5+6)/15 = 41/15