Question

Efectuati calculele, respectând ordinea efectuării operațiilor:

a)3×(-6)+6×(-3)+35
b)-15:(-6+1)-24:(-8+14)
c)-1+2×[-3+4×(-5+6)]
d)[(-6+7×2):10+9]×3
e)[-4+(-3+91:7):(-5)]:(-2)
f)
${2}^{3} + ( - {3})^{2} + ( - 2) \times ( + 3)$
​

Answer 1

Răspuns:

Explicație pas cu pas:

a)  

3×(-6)+6×(-3)+35  = - 1

= - 18 - 18 + 35 =

= - 36 + 35 =

= - 1

_______________

b)

-15:(-6+1)-24:(-8+14)  = - 1

= - 15 : ( - 5 ) - 24 : ( + 6 ) =

= 3 - 4 =

= - 1

_________________

c)

-1+2×[-3+4×(-5+6)]  = 1

= - 1 + 2 × ( - 3 + 4 × 1) =

= - 1 + 2 × ( - 3 + 4 ) =

= - 1 + 2 × ( + 1 ) =

= - 1 + 2 =

= 1

___________________

d)

[(-6+7×2):10+9]×3 =

= [ ( - 6 + 14 ) : 10 + 9 ] × 3 =

= [ ( + 8 ) : 10 + 9 ] × 3 =

= ( 0,8 + 9 ) × 3 =

= 9,8 × 3 =

= 29,4

_____________________

e)

[-4+(-3+91:7):(-5)]:(-2)  =

= [ - 4 + ( - 3 + 13) : ( - 5 ) ] : ( - 2 ) =

= [ - 4 + ( + 10 ) : ( - 5) ] : ( - 2) =

= ( - 4 - 2 ) : ( - 2 ) =

= ( - 6 ) : ( - 2 ) =

= 3  

__________________________

f)

2³ + ( - 3 )² + ( - 2 ) × ( + 3 ) = 11

= 8 + 9 - 6 =

= 17 - 6 =

= 11