efetue as operações com frações: A) 5+2/5-1/3+1/2 B)2/7*21/14*8/6= C)2/7:8/14
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Boa noite
a)
3 + 2/5 - 1/3 + 1/2
mmc = 30
90/30 + 12/30 - 10/30 + 15/30 = 107/30
b)
2/7 * 21/14 * 8/6 =
2/7 * 3/2 * 4/3 = 24/42 = 4/7
c)
(2/7) / (8/14) = (2/7)*(14/8) = 28/56 = 1/2
a)
3 + 2/5 - 1/3 + 1/2
mmc = 30
90/30 + 12/30 - 10/30 + 15/30 = 107/30
b)
2/7 * 21/14 * 8/6 =
2/7 * 3/2 * 4/3 = 24/42 = 4/7
c)
(2/7) / (8/14) = (2/7)*(14/8) = 28/56 = 1/2
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