Răspuns:
1) (-2)x(-13)=26
2) (-45)x(+2)=-90
3) (-17+2+19-3)x(+25-8+1-26)=(-15+19-3)x(17+1-26)=(4-3)x(18-26)=1x(-8)=-8
4) (-1+36-32)x(-8+52-41)=(35-32)x(44-41)=3x3=9
5) (258-189-96)x(-279+421-156)= (69-96)x(142-156)= -27x(-14)= 378
6) -2x[-4+3x(-29+3+28)-2x(+14-15+2)]
-2x[-4+3x(-26+28)-2x(-1+2)]
-2x[-4+3x2-2x1]=-2x[-4+6-2]= -2x0=0
7) -12x[-17+15x(+59-27-30)-21]=
-12x[-17+15x(32-30)-21]
-12x[-17+15x1-21]=-12x[-17+15-21]= -12x[-2-21]= -12x(-23)=276
8) -139x[+711-394x(-417+395+24)]
-139x[711-394x(-22+24)]
-139x[711-394x2]=-139x[711-788]=-139x(-77)=10703
9) +2x{+5x[+28-2x(-19+6+17)]-23}=
2x{5x[28-2x(-13+17)]-23}=
2x{5x[28-2x4]-23}=
2x{5x[28-8]-23}= 2x{5x20-23}=2x{100-23}=2x77=154
10) -11x{18x(-15)+10x[(-12)x(+13)-(-28+76)x(89-93)]}
-11x{-270+10x[-156-48x(-4)]}
-11x{-270+10x[-156+192]}
-11x{-270+10x36}=-11x{-270+360}=-11x90=-990
Explicație pas cu pas:
