Question

Am nevoie de ajutor. Ofer 30 de puncte pentru rezolvarea celor doua exercitii.

Answer 1

Explicație pas cu pas:

6.

a)

-35+[-23-(-27+11-9)+41]+(25-36)=

-35+[-23-(-16-9)+41]+(-11)=

-35+[-23-(-25)+41]-11=

-35+(-23+25+41)-11=

-35+(2+41)-11=

-35+43-11=

8-11= -3

b)

-(-20-15)-[(43-54)-(21-19-15)]=

-(-35)-[-11-(2-15)]=

+35-[-11-(-13)]=

+35-(-11+13)=

+34-2=32

c)

34-(-20-42)-[(64-70)-(15-23-12)]=

34-(-42)-[-6-(-8-12)]=

34-42-[-6-(-20)]=

34-42-(-6+20)=

34-42-(+14)=

34-42-14=

-8-14= -22

d)

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

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

-63-(-45+36-62)+16=

-63-(-9-62)+16=

-64-(-71)+16=

-64+71+16=

7+16=23

e)

-54-[-43-(-17-59+38)-(-13)]+25=

-54-[-43-(-76+38)+13]+25=

-54-[-43-(-38)+13]+25=

-54-(-43+38+13)+25=

-54-(-5+13)+25=

-54-(+8)+25=

-54-8+25=

-62+25= -37

7.

a)

(-27+43)-{[(-30+24)-(-18+25)]-(-37+53)}=

16-{[-6-(+7)]-(+16)}=

16-[(-6-7)-16]=

16-(-13-16)=

16-(-29)=

16+29=45

b)

(-33+49)-{[(-42+50)-(-24+35)]-(-29+34)}=

16-{[(8-(+11)]-(+5)}=

16-[(8-11)-5]=

16-(-3-5)=

16-(-8)=

16+8=24

c)

(-28+41)+[9-(-42+51)+(17-25+33)]=

13+[9-(+9)+(-8+33)]=

13+(9-9+25)=

13+25=38

d)

(37-48)+[12-(-21+33)+(43-37-11)]=

-11+[12-(+12)+(6-11)]=

-11+[12-12+(-5)]=

-11+(12-12-5)=

-11+(-5)=

-11-5= -16

e)

[-35+(-21-7+24)-(15-27+19)+34]-(+73)=

[-35+(-28+24)-(-12+19)+34]-73=

[-35+(-4)-(+7)+34]-73=

(-35-4-7+34)-73=

(-39-7+34)-73=

(-46+34)-73=

-12-73= -85

f)

[-60+(32-43)-(-24+15)-(+33)]+(-34+49)=

[-60+(-11)-(-9)-33]+15=

(-60-11+9-33)+15=

(-71+9-33)+15=

(-62-33)+15=

-95+15= -80

Reține:

+ • - = -

- • + = -

+ • + = +

+ • + = +

sper că te-am ajutat