Ajutatima va rog frumos!
1) Calculati:
a) 2+(-5)+10+(-6)=
b)(3+10)+(-3)+(-6)=
c)-6+11+(-2)+6+(-2)=
d)(3+5)+(-4)+(-2)+(-5)=
e)(10+20+30)+10+20+(-30)+10+(-20)+(40)+(-10)+(-30)=
f)(30+50+10)+30+(-50)+10+30+50+(-10)+(-30)+50+(-10)=
Exercitiu 2
Verificati daca:
a)-4+(-2)+3-(-5+7-9+1)=3
b)-50+14+(-7)= -43
c)40-(65-84)=60
d)17+(-2)-(-4)=20
e)16-(-4)-8-(-9)-24=3
f)7-(2-4)-10
Exercitiu 3
Efectuati calculele:
a)-94-17+42+(-70+81-1)=
b)-6-[2+(-8)-1]=
c)77-204+(245-475)-(41-242-156)=
d)5- {2-[1-(-2)] } =
e)-400-[-245+(185-6100)]=
EXERCITILE LE VREAU DETALIATE !!!! CINE TERMINA PRIMU PANA IN 20:30 II DAU COROANA SI 5 STELE!! Va rog pana in 20:30 !! :(
Răspunsuri la întrebare
Explicație pas cu pas:
1) Calculați:
a) 2+(-5)+10+(-6) = 2-5+10-6 = -3+10-6 = 7-6 = 1
b) (3+10)+(-3)+(-6) = 13-3-6 = 10-6 = 4
c) -6+11+(-2)+6+(-2) = 5-2+6-2 = 3+6-2 = 9-2 = 7
d) (3+5)+(-4)+(-2)+(-5) = 8-4-2-5 = 4-2-5 = 2-5 = - 3
e) (10+20+30)+10+20+(-30)+10+(-20)+(40)+(-10)+(-30) =
= 60+30-30+10-20+40-10-30 =
= 60-20+40-30 =
= 40+40-30 =
= 50
f) (30+50+10)+30+(-50)+10+30+50+(-10)+(-30)+50+(-10) =
= 90+30-50+90-10-30+50-10 =
= 90+90-10-10 =
= 180-10-10 =
= 160
2) Verificați:
a) -4+(-2)+3-(-5+7-9+1) = 3
- 4 - 2 + 3 - (-6) = 3
-6 + 3 + 6 = 3
3 = 3 (A)
b) -50+14+(-7) = - 43
- 36 - 7 = - 43
- 43 = - 43 (A)
c) 40-(65-84) = 60
40 - ( - 19) = 60
40 + 19 = 60
59 = 60 (F)
d) 17+(-2)-(-4) = 20
17 - 2 + 4 = 20
15 + 4 = 20
19 = 20 (F)
e) 16-(-4)-8-(-9)-24 = 3
16 + 4 - 8 + 9 - 24 = 3
20 - 8 + 9 - 24 = 3
12 + 9 - 24 = 3
21 - 24 = 3
- 3 = 3 (F)
f) 7 - (2-4) - 10 =7 - (-2) -10 =7+2-10 = - 1
3) Efectuați:
a) -94-17+42+(-70+81-1) =
- 111 + 42 + ( 11-1) =
- 69 + 10 =
- 59
_____
b) -6-[2+(-8)-1] =
- 6 - ( 2 - 8 - 1) =
- 6 - ( -6 - 1) =
- 6 - (-7) =
- 6 + 7 =
1
____
c) 77-204+(245-475)-(41-242-156) =
-127 + (-230) - (-357) =
- 127 - 230 + 357 =
- 357 + 357 =
0
_____
d) 5- {2-[1-(-2)] } =
5 - [ 2 - (1 + 2)] =
5 - ( 2- 3) =
5 - ( -1) =
5 + 1 =
6
____
e) -400-[-245+(185-6100)] =
- 400 - ( -245 - 5915) =
- 400 - ( - 6160) =
- 400 + 6160 =
5760
______