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25. Calculaţi:
a) 3. (-5)-(-12);
c)(-45): (3 – 8) + (-2) · 2;
e) (-1) + 2 .(-1);
g) 28 : (-2) – (-5)°;
b) (1 – 2 + 3 – 4):(-2);
d) 13 + 24 :(-2);
f)(-2)2 – (-2)3 + 32;
h) 2 -(-3)4 · 35: (-3)?.

Răspuns :

Răspuns:

a) 3×(-5)-(-12)= -15+12= -3

c) (-45): (3 - 8) + ( -2) = - 45 : - 5 - 2 = 9 - 2 = 7

e) ( - 1) + 2 × ( - 1) = - 1 - 2 = - 3

g) 28 : ( - 2) - ( - 5) = - 14 + 5 = - 9

b) ( 1 - 2 + 3 - 4) : ( - 2) = ( -2) : ( - 2) = 4

d) 13 + 24 : ( - 2) = 13 - 12 = 1

f) ( - 2) × 2 - ( - 2) × 3 + 32 = - 4 + 6 + 32 = 34

h) 2 - ( - 3) × 4 × 35 : ( - 3) = 2 + 12 × 35 : ( - 3) = 2 + 420 : ( - 3) = 2 - 140 = - 138

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