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Exercice 4: Effectuer les calculs suivants et justifier le signe du résultat

A=(-2) × (-3) × (+5) =

B = (-3) × (-2) × (-4) =

C = (+6) × (-1) × (+3) =

D = (-3,2) × (-10) × (+2) × (-0,5) =

E= (-75) × (-0,25) x (+4) × (+2) =

F=(-3) × (-0,1) × (+5) × (+ 4) =

G = (+2) × (-10) × (+3) × (-1) × (-1) =

Merci beaucoup car je n'ai vraiment rien compris!​

Sagot :

MAUDMARINE

Bonsoir

Exercice 4: Effectuer les calculs suivants et justifier le signe du résultat

A=(-2) × (-3) × (+5) =  6 x 5 = 30

B = (-3) × (-2) × (-4) =  6 x (- 4) = - 24

C = (+6) × (-1) × (+3) =  (- 6) x 3 = - 18

D = (-3,2) × (-10) × (+2) × (-0,5) =  32 x (- 1) = - 32

E= (-75) × (-0,25) x (+4) × (+2) =  (- 0,25) x 4 x 2 x (- 75) = (- 1) x (- 150) = 150

F=(-3) × (-0,1) × (+5) × (+ 4) =  (- 0,3) x 20 = - 6

G = (+2) × (-10) × (+3) × (-1) × (-1) = (- 20) x (- 3) x (- 1) = 60 x (- 1) = - 60.