Répondre :
A = 7/6 + 2/3
A = 7/6 + (2x2)/(3x2)
A = 7/6 + 4/6
A = 11/6
B = 4/5 + 2/15
B = (4x3)/(5x3) + 2/15
B = 12/15 + 2/15
B = 14/15
C = 7/5 + 1
C = 7/5 + (1x5)/(1x5)
C = 7/5 + 5/5
C = 12/5
D = 5 + 3/2
D = (5x2)/(1x2) + 3/2
D = 10/2 + 3/2
D = 13/2
E = 8/9 - 1/3
E = 8/9 - (1x3)/(3x3)
E = 8/9 - 3/9
E = 5/9
F = 3 - 5/7
F = (3x7)/(1x7) - 5/7
F = 21/7 - 5/7
F = 16/7
G = 13/12 - 19/48
G = (13x4)/(12x4) - 19/48
G = 52/48 - 19/48
G = 33/48
G = (3x11)/(3x16)
G = 11/16
H = 17/13 - 11/65
H = (17x5)/(13x5) - 11/65
H = 85/65 - 11/65
H = 74/65
2)
A = 8/12 + 5/3
A = (2x4)/(3x4) + 5/3
A = 2/3 + 5/3
A = 7/3
B = 40/72 - 1/9
B = (8x5)/(8x9) - 1/9
B = 5/9 - 1/9
B = 4/9
C = 15/35 + 2/7
C = (3x5)/(7x5) + 2/7
C = 3/7 + 2/7
C = 5/7
D = 5/3 - 52/39
D = 5/3 - (13x4)/(13x3)
D = 5/3 - 4/3
D = 1/3
3)
A = 13/8 + 5/2 + 3/4
A = 13/8+(5x4)/(2x4)+(3x2)/(4x2)
A = 13/8 + 20/8 + 6/8
A = 39/8
B = 5/12 + 11/24 + 1/6
B = (5x2)/(12x2)+11/24+(1x4)/(6x4)
B = 10/24 + 11/24 + 4/24
B = 25/24
C = 2 + 3/7 + 11/14
C = (2x14)/(1x14)+(3x2)/(7x2) + 11/14
C = 28/14 + 6/14 + 11/14
C = 45/14
Et tu fais pareil pour D, E et F
A = 7/6 + (2x2)/(3x2)
A = 7/6 + 4/6
A = 11/6
B = 4/5 + 2/15
B = (4x3)/(5x3) + 2/15
B = 12/15 + 2/15
B = 14/15
C = 7/5 + 1
C = 7/5 + (1x5)/(1x5)
C = 7/5 + 5/5
C = 12/5
D = 5 + 3/2
D = (5x2)/(1x2) + 3/2
D = 10/2 + 3/2
D = 13/2
E = 8/9 - 1/3
E = 8/9 - (1x3)/(3x3)
E = 8/9 - 3/9
E = 5/9
F = 3 - 5/7
F = (3x7)/(1x7) - 5/7
F = 21/7 - 5/7
F = 16/7
G = 13/12 - 19/48
G = (13x4)/(12x4) - 19/48
G = 52/48 - 19/48
G = 33/48
G = (3x11)/(3x16)
G = 11/16
H = 17/13 - 11/65
H = (17x5)/(13x5) - 11/65
H = 85/65 - 11/65
H = 74/65
2)
A = 8/12 + 5/3
A = (2x4)/(3x4) + 5/3
A = 2/3 + 5/3
A = 7/3
B = 40/72 - 1/9
B = (8x5)/(8x9) - 1/9
B = 5/9 - 1/9
B = 4/9
C = 15/35 + 2/7
C = (3x5)/(7x5) + 2/7
C = 3/7 + 2/7
C = 5/7
D = 5/3 - 52/39
D = 5/3 - (13x4)/(13x3)
D = 5/3 - 4/3
D = 1/3
3)
A = 13/8 + 5/2 + 3/4
A = 13/8+(5x4)/(2x4)+(3x2)/(4x2)
A = 13/8 + 20/8 + 6/8
A = 39/8
B = 5/12 + 11/24 + 1/6
B = (5x2)/(12x2)+11/24+(1x4)/(6x4)
B = 10/24 + 11/24 + 4/24
B = 25/24
C = 2 + 3/7 + 11/14
C = (2x14)/(1x14)+(3x2)/(7x2) + 11/14
C = 28/14 + 6/14 + 11/14
C = 45/14
Et tu fais pareil pour D, E et F
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