Question

5. Calcula
i) 8 + [4 – (3 + 5)] = j) 10 – [6 + (2 + 7)] =
k) 15 – [2 – (6 – 10)] = l) 15 – [10 – (8 + 4)] =
m) 12 – [7 – (2 – 10)] = n) (–6) + [5 + (2 – 12)] =
o) (–7) – [3 – (4 – 9)] = p) (2 – 10) + [5 – (8 + 2)] =
b) (12 – 3) – [1 – (2 – 6)] = q) [9 – (+5)] + [7 + (–10)] =
r) [10 – (–2)] – [5 – (+12)] = s) [8 – (6 + 4)] – (5 – 7) =

Answer 1

Respuesta:

Explicación paso a paso:

i) 8 + [4 – (3 + 5)]

  8 +[4-3-5)]

  8+4-3-5

  12-8 = 4

j) 10 – [6 + (2 + 7)]

   10 - [6+2+7)]

   10 - 6 -2 -7

     4 -9= -5

k) 15 – [2 – (6 – 10)]

    15 -[2-6+10]

    15-2 -6 +10

    13+4= 17

l) 15 – [10 – (8 + 4)]

  15 - [10-8-4]

  15-10+8+4

     5+12= 17

m) 12 – [7 – (2 – 10)]

    12- [7-2+10]

     12-7+2-10

        5-8= -3

n) (–6) + [5 + (2 – 12)]

     -6 +[5 + 2 -12]

     -6+5+2-12

        -1-10= -11

o) (–7) – [3 – (4 – 9)]

    -7-[ 3-4+9]

    -7-3+4-9

      -10-5 = -15

p) (2 – 10) + [5 – (8 + 2)]

       -8+ [5 - 8-2]

       -8 +5 -8 -2

           -3 -10= -13

b) (12 – 3) – [1 – (2 – 6)]

       9- [1 -2 +6]

       9 -1 +2 -6

         8 -4 = 4

q) [9 – (+5)] + [7 + (–10)]

   [9-5] + [7-10]

      4 + [-3]

        4 -3= 1

r) [10 – (–2)] – [5 – (+12)]

   [10+2] - [5-12]

      12 - [-7]

      12 +7= 21

s) [8 – (6 + 4)] – (5 – 7)

    [8 - (10)] - (-2)

    [8-10] +2

       -2 +2 = 0