Question

15 + 7 - 7 9 + 54 - 7:
45 - 7 + 10 - 32 + 5 - 7:
6 + 7 (8 + 7) + 40 - 18:
(6 + 45 + 12 - 8) - (4 + 20 + 56 - 30) + 14

Answer 1

Respuesta:

a. 15 + 7 - 7 9 + 54 - 7 = 10

b. 45 - 7 + 10 - 32 + 5 - 7 = 14

c. 6 + 7 (8 + 7) + 40 - 18

   6 + 7 (15) + 40 - 18

   6 + 105 + 40 - 18 = 133

d. (6 + 45 + 12 - 8) - (4 + 20 + 56 - 30) + 14

= (55) - (50) + 14

= 55 - 50 + 14 = 19