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Blue739
@Blue739
May 2019
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Aidez moi je n'ai pas compris l'exercice 5 merci :)
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nadiab
Verified answer
Bonjour,
J'écris les 2 méthodes puis tu calcules
A= 5(6+8)
A= 5( 14)
A= calcule
A= (5x6) + (5 x 8)
A= (...) + (....) calcule
B= 6(9-3) calcule
B= (6x9)-(6x3) calcule
C= 3(12+7)
C= (12x3)+(7x3)
D= 2(5.5-1.3)
D= (5.5x2) - (2x1.3)
E= 63(92+63)
E= (63x92)+(63x8)
F= 38(107-7)
F= (38x107) - (7x38)
1 votes
Thanks 0
loulakar
1) priorité à la multiplication :
A = 5 x 6 + 5 x 8
A = 30 + 40
A = 70
B = 6 x 9 - 6 x 3
B = 54 - 18
B = 36
C = 12 x 3 + 7 x 3
C = 36 + 21
C = 57
D = 5,5 x 2 - 2 x 1,3
D = 11 - 2,6
D = 8,4
E = 63 x 92 + 63 x 8
E = 5796 + 504
E = 6300
F = 38 x 107 - 7 x 38
F = 4066 - 266
F = 3800
2) distributivité :
A = 5 x 6 + 5 x 8
A = 5 x (6 + 8)
A = 5 x 14
A = 70
B = 6 x 9 - 6 x 3
B = 6 x (9 - 3)
B = 6 x 6
B = 36
C = 12 x 3 + 7 x 3
C = 3 x (12 + 7)
C = 3 x 19
C = 57
D = 5,5 x 2 - 2 x 1,3
D = 2 x (5,5 - 1,3)
D = 2 x 4,2
D = 8,4
E = 63 x 92 + 63 x 8
E = 63 x (92 + 8)
E = 63 x 100
E = 6300
F = 38 x 107 - 7 x 38
F = 38 x (107 - 7)
F = 38 x 100
F = 3800
0 votes
Thanks 1
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Bonjour,pouvez-vous m'aider car j'ai pas compris merci :)
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Verified answer
Bonjour,J'écris les 2 méthodes puis tu calcules
A= 5(6+8)
A= 5( 14)
A= calcule
A= (5x6) + (5 x 8)
A= (...) + (....) calcule
B= 6(9-3) calcule
B= (6x9)-(6x3) calcule
C= 3(12+7)
C= (12x3)+(7x3)
D= 2(5.5-1.3)
D= (5.5x2) - (2x1.3)
E= 63(92+63)
E= (63x92)+(63x8)
F= 38(107-7)
F= (38x107) - (7x38)
A = 5 x 6 + 5 x 8
A = 30 + 40
A = 70
B = 6 x 9 - 6 x 3
B = 54 - 18
B = 36
C = 12 x 3 + 7 x 3
C = 36 + 21
C = 57
D = 5,5 x 2 - 2 x 1,3
D = 11 - 2,6
D = 8,4
E = 63 x 92 + 63 x 8
E = 5796 + 504
E = 6300
F = 38 x 107 - 7 x 38
F = 4066 - 266
F = 3800
2) distributivité :
A = 5 x 6 + 5 x 8
A = 5 x (6 + 8)
A = 5 x 14
A = 70
B = 6 x 9 - 6 x 3
B = 6 x (9 - 3)
B = 6 x 6
B = 36
C = 12 x 3 + 7 x 3
C = 3 x (12 + 7)
C = 3 x 19
C = 57
D = 5,5 x 2 - 2 x 1,3
D = 2 x (5,5 - 1,3)
D = 2 x 4,2
D = 8,4
E = 63 x 92 + 63 x 8
E = 63 x (92 + 8)
E = 63 x 100
E = 6300
F = 38 x 107 - 7 x 38
F = 38 x (107 - 7)
F = 38 x 100
F = 3800