Bonjour vous pouvez m’aider svp a) −3+5-2= b) 4.5+ (-7)=.... c) 4-2-6 (-1) =.... d) 6+ (-3) 5 = e) -4 (-12 + 8) = f) -34 (5-1) = g) (-7-1) (-2) = h) 6+5 (-3) =

Bonsoir,

Rappels :

-> + et + => +

-> + et - => -

-> - et - => +

Priorité de calculs : parenthèse; puissance, multiplications et divisions, addition et soustraction

Donc :

a) −3+5-2=0

b) 4.5+ (-7)

= 4.5 - 7

= - 2.5

c) 4-2-6 (-1)

= 4 - 2 + 6

= 8

d) 6+ (-3) 5 =

= 6 + (-15)

= - 9

e) -4 (-12 + 8) =

= - 4 x ( -4)

= 16

f) -34 (5-1) =

= - 34 x 4

= - 136

g) (-7-1) (-2) =

= - 8 x (-2)

= 16

h) 6+5 (-3) =

= 6 + (-15)

= 6 - 15

= - 9

i) -10 (-1-3) =

= - 10 x ( - 4)

= 40

Bonne soirée.