Question

38 Calcula.
a) (2 – 10) + [5 – (8 + 2)] =
b) (12 – 3) – [1 – (2 – 6)] =
c) [9 – (+5)] + [7 + (–10)] =
d) [10 – (–2)] – [5 – (+12)] =
e) [8 – (6 + 4)] – (5 – 7) =
f) [1 + (6 – 9)] – ayuda por favor

Answer 1

Respuesta:

a) -13

b) 4

c) 1

d) 15

e) 0

f) -2

Explicación paso a paso:

a) (2 – 10) + [5 – (8 + 2)] =

            -8 + [5 - 10]

            -8 - 5 = -13

b) (12 – 3) - [1 – (2 – 6)] =

             9 - [1 - (-4)]

             9 - [1+4]

             9- 5 = 4

c) [9 – (+5)] + [7 + (–10)]

        [9 – 5] + [7 - 10]

                 4 + [-3]  = 4-3 = 1

d) [10 – (–2)] – [5 – (+12)] =

        [10 + 2] -  [5 – 12]

                 8 - [-7] = 8 + 7 = 15

e) [8 – (6 + 4)] – (5 – 7) =

          [8 – 10] - (-2) = -2 + 2 = 0

f) [1 + (6 – 9)] =

  [1 + (-3)] =  [1 -3] = -2