a) 6 + - 7 – (- 8) + 4 – 2 =
b) 16 – 21 + 18 – 8 =
c) 108 + - 200 + 9 – 42 =
d) 46 – {38 – (- 2) + - 9 + (42 – 18 + -15) – (-7)} =
e) 30 : ((-12 + 9) – (3 • 3 – 12 : 3) + 2) =
f) 45 : {-2 + 12 : (-7 + 3) + 12 – [ (-24) : ( (-3) • 5 + 7) ] + 5} =
g) (8 • 7 + 5 • (-8) ) : (-4) =
porfavor ayuda
Respuestas
a) 6 + - 7 – (- 8) + 4 – 2
= -1 – (- 8) + 4 – 2
= -1 + 8 + 4 – 2
= 7 + 4 - 2
= 11 - 2
= 9
b) 16 – 21 + 18 – 8
= -5 + 18 – 8
= 13 - 8
= 5
c) 108 + - 200 + 9 – 42
= 108 - 200 + 9 – 42
= -92 + 9 – 42
= -83 -42
= -125
d) 46 – {38 – (- 2) + - 9 + (42 – 18 + -15) – (-7)}
= 46 – {38 – (- 2) + - 9 + (24 + -15) – (-7)}
= 46 – {38 – (- 2) + - 9 + (9) – (-7)}
= 46 – {38 + 2 + - 9 + (9) – (-7)}
= 46 – {40 + - 9 + (9) – (-7)}
= 46 – {31 + (9) – (-7)}
= 46 – {40 – (-7)}
= 46 – {40 + 7}
= 46 – {47}
= -1
e) 30 : ((-12 + 9) – (3 • 3 – 12 : 3) + 2)
= 30 : ((-12 + 9) – (9 – 12 : 3) + 2)
= 30 : ((-3) – (9 – 12 : 3) + 2)
= 30 : ((-3) – (-3 : 3) + 2)
= 30 : ((-3) – (-1) + 2)
= 30 : ((-3) + 1 + 2)
= 30 : (-2 + 2)
= 30 : (0)
= 0
f) 45 : {-2 + 12 : (-7 + 3) + 12 – [ (-24) : ( (-3) • 5 + 7) ] + 5}
= 45: {-2 + 12 : (-7 + 3) + 12 – [ (-24) : ( -15 + 7) ] + 5}
= 45 : {-2 + 12 : (-7 + 3) + 12 – [ (-24) : (-8) ] + 5}
= 45 : {-2 + 12 : (-7 + 3) + 12 – [ 3 ] + 5}
= 45 : {-2 + 12 : (4) + 12 – [ 3 ] + 5}
= 45 : {-2 + 3 + 12 – [ 3 ] + 5}
= 45 : {1 + 12 – [ 3 ] + 5}
= 45 : {13 – [ 3 ] + 5}
= 45 : {10 + 5}
= 3
g) (8 • 7 + 5 • (-8) ) : (-4)
= (56 + 5 • (-8) ) : (-4)
= (56 + (-40)) : (-4)
= (16) : (-4)
= -4