Question

Dacă a = 3 x 3 + 2 x 4 x [7+6x (2 x 10 - 3) - 2 x 1] - 1000:10 şi
b = 9+ [7+3 (12 - 7)]: 2-5 x 2, atunci (a + b): 25 este egal cu:
a) 310
b) 31
c) 301
d) 1310​

Answer 1

Răspuns:

a = 3 x 3 + 2 x 4 x [7+6x (2 x 10 - 3) - 2 x 1] - 1000:10

a=9+8x [7+6x (20 - 3) - 2] - 100

a=9+8x (7+6x17-2) - 100

a=9+8x (7+102-2) - 100

a=9+8x107 - 100

a=9+856-100

a=765

b= 9+ [7+3 (12 - 7)]: 2-5 x 2

b= 9+ (7+3x5): 2-10

b=9+(7+15):2-10

b=9+22:2-10

b=9+11-10

b=10

(a+b):25=(765+10):25

(a+b):25=775:25

(a+b):25=31

raspuns b)

Explicație pas cu pas: