Devoirs De Maths

[Tim.Pot]

Bonjour,

Sujet : http://cjoint.com/data/ggvOjpMKBF.htm

Exercice 1:

a = (-3)-(-5)//// c = (-5)-(+6)//// b = (+7)-(+13)

a = (-3)+(+5)/// c = (-5)+(-6)/// b = (+7)+(-13)

a = (+2)/////// c = (-11)////// b = (-6)

d = 2-(-2)/////////////////// e = 4-7/// f = (-9)-5

d = /-/ (nombres opposés)/// e = 4+7// f = (-9)+5

/////////////////////////// e = 11// f = (-4)

D;E;F je pense avoir faux...

Exercice 2:

E = (-3)-(+10)-(+5)-(-2)

E = (-3)+(-10)+(-5)+(+2)

E = (-18) +(+2)

E = (-16)

F = (+3)-(-4)+(-7)+(+2)+11

F = (+3)+(+4)+(-7)+(+2)+11

F = (+3)+(+4)+(+2)+11+(-7)

F = (+20) +(-7)

F = (+13)

G = (+7)-(+10)-(-9)+(-3)

G = (+7)+(-10)+(+9)+(-3)

G = (+7)+(+9)+(-10)+(-3)

G = (+16) +(-13)

G = (+3)

H = -4,1+3,9-(-2,1)+2-(+0,9)

H = -4,1+3,9+(+2,1)+2+(-0,9)

H = -4,1+(-0,9)+3,9+(+2,1)+2

H = (-5) +(+8)

H = (+3)

[Papy BERNIE]

Bonjour,

exo 1 :

a , b et c sont bons.

d=-2-(-2)=-2+(+2)=0

e=-4-7=-4+(-7)=-11

f=-9+(-5)=-14

Ton énoncé est peu visible.

Exo 2 :

Tout bon.

[Barbidoux]

Bonjour,

Sujet : http://cjoint.com/data/ggvOjpMKBF.htm

Exercice 1:

a = (-3)-(-5)//// c = (-5)-(+6)//// b = (+7)-(+13)

a = -3+5 /// c = (-5)+(-6)/// b = (+7)+(-13)

a = 2/////// c = (-11)= -11 ////// b = (-6) =-6

d = 2-(-2)/////////////////// e = 4-7/// f = (-9)-5

d = 0 /-/ (nombres opposés)/// e = 4+7// f = -9-5

/////////////////////////// e = -3// f = -14

D;E;F je pense avoir faux...

Exercice 2:

E = (-3)-(+10)-(+5)-(-2)

E = -3-10-5+2=-16

F = (+3)-(-4)+(-7)+(+2)+11

F = 3+4-7+2+11=13

G = (+7)-(+10)-(-9)+(-3)

G =7-10+9-3=3

H = -4,1+3,9-(-2,1)+2-(+0,9)

H = -4,1+3,9+2,1+2-0,9=3