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Calcul mental
“Le code des opérations”
Série n°1
Diapositive 1

17 + 13 - 15
Diapositive 2

25 - 15 + 9 - 8
Diapositive 3

3×2+7
Diapositive 4

3×5:2
Diapositive 5

(2 + 3) × 4
FIN
CORRECTION
Diapositive 1

17 + 13 - 15
= 30 - 15 = 15
Diapositive 2

25 - 15 + 9 - 8
= 10 +1 = 11
Diapositive 3

3×2+7
= 6 + 7 = 13
Diapositive 4

3×5:2
= 15 : 2 = 7,5
Diapositive 5

(2 + 3) × 4
= 5 × 4 = 20

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