Question

Calculati media aritmetica a numerelor : a=9•81•9:27•9:3-9•81; b=(45•36+64•45):15-(27•80+80•73):(8•5).

Answer 1

a=6561:27 x 9:3-729=243 x 9:3-729=2187:3-729=729-729=0

a=0

b=(1620 +2880):15-(2160+5840):40

b=4500:15-8000:40

b=300-200=100

b=100

(a+b):2

(0+100):2

100:2=50

Raspuns:50