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Calcul mental 
N°9 
“Les nombres relatifs”
Diapositive 1 
18 x (-0,1)
Diapositive 2 
-12 x (-0,5)
Diapositive 3 
-25 x (-9) x (-4)
Diapositive 4 
- 59 : (-10)
Diapositive 5 
55 : (-5)
CORRECTION
FIN
Diapositive 1 
18 x (-0,1) 
= -1,8
Diapositive 2 
-12 x (-0,5) 
= 6
Diapositive 3 
-25 x (-9) x (-4) 
= -900
Diapositive 4 
- 59 : (-10) 
= 5,9
Diapositive 5 
55 : (-5) 
= -11

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