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a. 3/5-4/3=-11/15
b. 4/7-3/2=-13/14
c. 1/3-1/2=-1/6
d. 3/4/5/7=21/20
e. 8/3/1/10=80/3
b) -13/14 ó -0.92
c) -1/6 ó -0.16
Las demás si no me equivoco se dividen.
seria:
d) 1.05
e) 26.66