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DanyDeea
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1. Calculati:
a) -320 : (-8) + (-450) : (+50)
b) +210 : (-7) - (-27) : (+9)
c) -48 : (-12) + (+4) x (-6) + (-65) : (+13)
d) [8 - 5 x (+10) ] : [98 - 7 x (+10) - 2 x (+11) ]

2. Calculati a+b stiind ca:
a) a x c + b x c = 128 si c = -32
b) a x c + b x c = -96 si c = -3
c) a x c + b x c = -882 si c = -9

3.Rezolvati in multimea numerelor intregi ecuatiile:
a) x + 8 = -2
b) x + 10 = -5
c) x - 3 = -7
d) x - 9 = -6
e) x - 7 = 11
f) 8 = -3 + x
g) 9 = x + 23
h) 2x = -16
i) 9x = -36
j) -6x = 48
k) x : (-4) = -12

Răspuns :

Bunny2202
a) -320 : (-8) + (-450) : (+50)=
=-40+(-90)=
=-40-90=
=-130
b) +210 : (-7) - (-27) : (+9)=
=-30-(-3)=
=-30+3=
=-27
c) -48 : (-12) + (+4) x (-6) + (-65) : (+13)=
=4+(-24)+(-5)=
=4-24-5=
=-20-5=
=-25
d) [8 - 5 x (+10) ] : [98 - 7 x (+10) - 2 x (+11) ] =
=(8-50):(98-70-22)=
=-42:(-2)=
=21
3.Rezolvati in multimea numerelor intregi ecuatiile: 
a) x + 8 = -2
x=-8-2=-10
b) x + 10 = -5
x=-10-5=-15
c) x - 3 = -7
x=-7+3=-4
d) x - 9 = -6
x=-6+9=3
e) x - 7 = 11
x=11+7=18
f) 8 = -3 + x
x=8+3=11
g) 9 = x + 23
x=9-23=-14
h) 2x = -16
x=-16:2=-8
i) 9x = -36
x=-36:9=-4
j) -6x = 48
x=48:(-6)=-8
k) x : (-4) = -12
x=-12x(-4)=48
Sper ca iti e de ajutor raspunsurile. 

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