Question

вычислите. a) 25+2[12-3(11-7)]= b) [15-4(12-9)]+40= c) 51-7[(15-7)2-9]= d) [59-4(13-9)]-40= e) 3[2+5(71-5)]-129= f) 7-{[5-2(15-13])+9}+3= g) [29-3(4-1)]-(12+2)= h) 27-{[5-2(15-13)]+9}+3=. пожалуйста помогите срочноооооо по математике​

Answer 1

Ответ:

23

Пошаговое объяснение:

Answer 2

Давайте рассчитаем значения выражений:

a) 25 + 2[12 - 3(11 - 7)] = 25 + 2[12 - 3(4)] = 25 + 2[12 - 12] = 25 + 2[0] = 25 + 0 = 25

b) [15 - 4(12 - 9)] + 40 = [15 - 4(3)] + 40 = [15 - 12] + 40 = 3 + 40 = 43

c) 51 - 7[(15 - 7) * 2 - 9] = 51 - 7[(8) * 2 - 9] = 51 - 7[16 - 9] = 51 - 7[7] = 51 - 49 = 2

d) [59 - 4(13 - 9)] - 40 = [59 - 4(4)] - 40 = [59 - 16] - 40 = 43 - 40 = 3

e) 3[2 + 5(71 - 5)] - 129 = 3[2 + 5(66)] - 129 = 3[2 + 330] - 129 = 3[332] - 129 = 996 - 129 = 867

f) 7 - {[5 - 2(15 - 13)] + 9} + 3 = 7 - {[5 - 2(2)] + 9} + 3 = 7 - {[5 - 4] + 9} + 3 = 7 - [1 + 9] + 3 = 7 - 10 + 3 = 0

g) [29 - 3(4 - 1)] - (12 + 2) = [29 - 3(3)] - (12 + 2) = [29 - 9] - (12 + 2) = 20 - (12 + 2) = 20 - 14 = 6

h) 27 - {[5 - 2(15 - 13)] + 9} + 3 = 27 - {[5 - 2(2)] + 9} + 3 = 27 - {[5 - 4] + 9} + 3 = 27 - [1 + 9] + 3 = 27 - 10 + 3 = 20 + 3 = 23

Итак, результаты:

a) 25 b) 43 c) 2 d) 3 e) 867 f) 0 g) 6 h) 23