Question

6. Efectuați calculele:
a) -35+[-23 - (-27 + 11 - 9) + 41] + (25 - 36); b) (-20 - 15) - [(43 - 54) - (21 - 19- 15)];
c) 34 - (20 - 42) - [(64 - 70) - (15 -23 - 12)]; d) -63- [45+ (56 + 64 - 82) - (+62)] + 16;
e) -54-7-43-(-17 - 59 +38) - (-13)] + 25.

Answer 1

Răspuns:

a) -35+[-23-(-16-9)+41] + (25-36)= -35+(-23+25+41) - 11= -35+(2+41) -11=

= -35+43-11= -46+43= -3

b) (-20-15) - [(43-54) - (21-19-15)]= -35- [-11-(21-34)]= -35- (-11+13)= -35-2=-37

c) 34-(20-42) - [(64-70) - (15-23-12)]= 34-22-[-6 - (15-35)]= 34-22-(-6+20)=

= 34-22-14= 12-14=-2

d) -63-[45+ (56+64-82) - (+62)] +16 = -63- [45+ (120-82) - 62] +16=

=-63-(45+38-62)+ 16= -63-(83-62)+ 16= -63-21+16= -84+16= -68

e) -54-7-43-[(-17-59+38)-(-13)] +25= -104-[(-76+38)+13] +25=

=-104-[(-38+38)+13] +25= -104-13+25= -117+25= -92