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Sa se calculeze valoarea expresiei E=x+y+z+t,unde:a)x=9-7-10+3,y= -3+(-9)+(-10)+14,z= -2+(-5)-3+(-9),t= -18+(-5)-(-6)+8,b)x= -104+(-201)+350,y=250-(-100)-300,z=500-650-(-150),t= -820-(-32)+43+(-13)
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Răspuns :

a)E=x+y+z+t
x=9-7-10+3=2-10+3=-8+3=-5
y=-3-9-10+14=-12-10+14=-22+14=--8
z=-2-5-3-9=-7-3-9=-10-9=-19
t=-18-5+6+8=-23+6+8=-17+8=-9
E=-5-8-19-9=-13-19-9=-32-9=-41
b)x=-104-201+350=-305+350=45
y=250+100-300=350-300=50
z=500-650+150=-150+150=0
t=-820+32+43-13=-788+43-13=-735-13=-748
E=45+50+0-748=95-748=-653

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