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Speed10
@Speed10
January 2020
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Ajuda com frações.
a - 2/3 - 1/2 - 5 =
b- 2 - (-2/3 - 1/4) =
c- (1/4 x 3/5) x 2/7=
d- (5 - 1/3) elevado a 2 + (3 + 1/2) elevado a 2
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rosanev
A)
2/3 - 1/2 - 5 =
MMC = 6
(2.2 - 3.1 - 5.6)/6 = (4 - 3 - 30)/6 = -29/6
b) 2 - (-2/3 - 1/4) =
MMC: 12
[12.2 - (-4.2 - 3.1)]/12 = [24 - (-8 - 6)]/12 = 24 - (-14)/12 = 24 + 14/12 = 36/12 = 3
c) (1/4).(3/5).(2/7) = (1.3.2)/(4.5.7) = 6/140 (÷2) = 3/70
d) (5 - 1/3)² + (3 + 1/2)² =
[(3.5 - 1)/3]² + [(2.3 + 1)/2]² =
[(15 - 1)/3]² + [(6 + 1)/2]² =
[14/3]² + [7/2]² =
196/9 + 49/4 =
MMC: 36
(4.196 + 9.49)/36 = 1225/36
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Lista de comentários
2/3 - 1/2 - 5 =
MMC = 6
(2.2 - 3.1 - 5.6)/6 = (4 - 3 - 30)/6 = -29/6
b) 2 - (-2/3 - 1/4) =
MMC: 12
[12.2 - (-4.2 - 3.1)]/12 = [24 - (-8 - 6)]/12 = 24 - (-14)/12 = 24 + 14/12 = 36/12 = 3
c) (1/4).(3/5).(2/7) = (1.3.2)/(4.5.7) = 6/140 (÷2) = 3/70
d) (5 - 1/3)² + (3 + 1/2)² =
[(3.5 - 1)/3]² + [(2.3 + 1)/2]² =
[(15 - 1)/3]² + [(6 + 1)/2]² =
[14/3]² + [7/2]² =
196/9 + 49/4 =
MMC: 36
(4.196 + 9.49)/36 = 1225/36