Réponse :
Bonsoir
Explications étape par étape :
1)
1/3 + 1/4 + 5/12 = 4/12 + 3/12 + 5/12 = 12/12 = 1
Achille n'a pas raison
2. Effectue les calculs suivants en écrivant les étapes.
A = 1 + 3/10
Dénominateur commun = 10
A = 10/10 + 3/10
A = 13/10
B = 5/6 + 1/18
Dénominateur commun = 18
B = 15/18 + 1/18
B = 16/18
B = 8/9
C = 4/3 - 4/9
Dénominateur commun = 9
C = 12/9 - 4/9
C = 8/9
D = 7/15 - 3/10
Dénominateur commun = 30
D = 14/30 - 9/30
D = 5/30
D = 1/6
E = 3/2 - 1/7 + 1/4
Dénominateur commun = 28
E = 42/28 - 4/28 + 7/28
E = 45/28
F = 19/11 - (5/22 + 1/2)
Dénominateur commun = 22
F = 19/11 - (5/22 + 11/22)
F = 19/11 - 16/22
F = 38/22 - 16/22
F = 22/22
F = 1
G = (21/5 - 9/10) - (3/20 - 3/2)
Dénominateur commun = 20
G = (84/20 - 18/20) - (3/20 - 30/20)
G = 66/20 - (- 27/20)
G = 66/20 + 27/20
G = 93/20
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311 A = 1 + 3/10 D = 7/15 - 3/10
D = 7/15 - 3/10
= (7/15) - (3/10)
= (72/152) - (33/103)
= 14/30 - 9/30
= 5/30
E = 32 + 1/ B = 5/6 + 1/18
B = 5/6 + 1/18
= (5/6) + (1/18)
= (53/63) + (16/186)
= 15/18 + 6/108
= 225/324 + 36/324
= 261/324
C = 4/3 - 4/9
C = 4/3 - 4/9
= (4/3) - (4/9)
= (43/33) - (43/93)
= 12/9 - 12/9
= 0
F = 19/11 - (5/22 + 1/2)
(5/22 + 1/2)
= (5/22) + (1/2)
= (511/2211) + (122/222)
= 55/242 + 22/242
= 77/242
F = 19/11 - 77/242
= (19/11) - (77/242)
= (19242/11242) - (7711/24211)
= 4158/2662 - 847/2662
= 3311/2662
G = (21/5 - 9/10) - (3/20 - 3/2)
(3/20 - 3/2)
= (3/20) - (3/2)
= (32/202) - (310/210)
= 6/40 - 30/40
= -24/40
G = (21/5 - 9/10) - (-24/40)
= (21/5) - (9/10)
= (2110/510) - (95/105)
= 210/50 - 45/50
= 165/50
Verified answer
Réponse :
Bonsoir
Explications étape par étape :
1)
1/3 + 1/4 + 5/12 = 4/12 + 3/12 + 5/12 = 12/12 = 1
Achille n'a pas raison
2. Effectue les calculs suivants en écrivant les étapes.
A = 1 + 3/10
Dénominateur commun = 10
A = 10/10 + 3/10
A = 13/10
B = 5/6 + 1/18
Dénominateur commun = 18
B = 15/18 + 1/18
B = 16/18
B = 8/9
C = 4/3 - 4/9
Dénominateur commun = 9
C = 12/9 - 4/9
C = 8/9
D = 7/15 - 3/10
D = 7/15 - 3/10
Dénominateur commun = 30
D = 14/30 - 9/30
D = 5/30
D = 1/6
E = 3/2 - 1/7 + 1/4
Dénominateur commun = 28
E = 42/28 - 4/28 + 7/28
E = 45/28
F = 19/11 - (5/22 + 1/2)
Dénominateur commun = 22
F = 19/11 - (5/22 + 11/22)
F = 19/11 - 16/22
F = 38/22 - 16/22
F = 22/22
F = 1
G = (21/5 - 9/10) - (3/20 - 3/2)
Dénominateur commun = 20
G = (84/20 - 18/20) - (3/20 - 30/20)
G = 66/20 - (- 27/20)
G = 66/20 + 27/20
G = 93/20