Question

calculati ,respectând ordinea efectuării operatiilor:a)[(9 supra 32 -5 supra 24 -7 supra 36 ):(-7 supra 24 )-0, (6)]:(-0,1)

Answer 1

[(9/32 - 5/24 - 7/36):(-7/24) - 2/3]·(-10)=
Calculam numitorul comun in prima paranteza :
32=2⁵
24=2³·3
36=2²·3²
_______
c.m.m.m.c.=2⁵·3²=288
[(9·9-5·12-7·8)/288 · (-24/7) - 2/3]·(-10)=
[(81-60-56)/288 · (-24/7) - 2/3]·(-10)=
[(-35/288) · (-24/7) - 2/3]·(-10)=
(5/12 - 2/3)·(-10)=
(5-2·4)/12 · (-10)=
(-3/12)·(-10)=
(-1/4)·(-10)=
5/2