Determine o valor de cada expressao a seguir:
a)+25-(-4).(-5)-4-1=
b)1-4/5-2/5=
c)(+6/5):(-1/2)-3=
d)3+(-3/4).(-8/9)=
e)x+1/3+5/4=4-2x=
a)+25-(-4).(-5)-4-1=
b)1-4/5-2/5=
c)(+6/5):(-1/2)-3=
d)3+(-3/4).(-8/9)=
e)x+1/3+5/4=4-2x=
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25 - 20 - 4 - 1 =
5 - 4 - 1 =
1 - 1 =
0
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b) 1 - 4/5 - 2/5 =
mmc (1, 5) = 5
5 - 4 - 2 = - 1
5 5
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c) (+ 6/5) : (- 1/2) - 3 =
6/5 * (- 2/1) - 3 =
6/5 * (- 2) - 3 =
- 12/5 - 3 =
mmc (1, 5) = 5
- 12 - 15 = - 27
5 5
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d) 3 + (- 3/4) . (- 8/9) =
3 + (24/36) =
3 - 24/36 =
mmc (1, 36) = 36
108 + 24 = 132 ou 11 ou 3 2
36 36 3 3
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e) x + 1/3 + 5/4 = 4 - 2x
mmc (3, 4) = 12
12x + 4 + 15 = 48 - 24x
12x + 24x = 48 - 4 - 15
36x = 29
x = 29 : 36
x = 29
36