Efectuá
a.) 3/7 + -5/4 c.)2/3 - (1/2 - 1/3)
b.) 3/20 - 5/12 d.)2- (-1/3) + 2/5
a.) 3/7 + -5/4 c.)2/3 - (1/2 - 1/3)
b.) 3/20 - 5/12 d.)2- (-1/3) + 2/5
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b. (9-25)/60=-16/60=-4/15
c. 2/3-(3-2/6)
2/3-(1/6)=(4-1)/6=3/6=1/2
d.2+1/3+2/5
(30+5+6)/15 =41/15