Bonsoir,
A = 11/9 - 7/9
A = 4/9
B = 7/5 + 3/20
B = (7 x 4) / (5 x 4) + 3/20
B = 28/20 + 3/20
B = 31/20
C = 3 + 2/5
C = (3 x 5) / (1 x 5) + 2/5
C = 15/5 + 2/5
C = 17/5
D = 5/4 - 1/2
D = 5/4 - (1 x 2) / (2 x 2)
D = 5/4 - 2/4
D = 3/4
E = 3/4 + 1/2 + 5/8
E = (3 x 2) / (4 x 2) + (1 x 4) / (2 x 4) + 5/8
E = 6/8 + 4/8 + 5/8
E = 15/8
F = 3/4 - 2/3
F = (3 x 3) / (4 x 3) - (2 x 4) / (3 x 4)
F = 9/12 - 8/12
F = 1/12
Effectue les opérations suivantes
Méthode : on met les termes au même dénominateur si besoin puis on simplifie.
A = 11/9 - 7/9 = (11-7)/9 = 4/9
B = 7/5 + 3/20 = (7×4)/(5×4) + 3/20
B = 28/20 + 3/20 = 31/20
C = 3 + 2/5 = 15/15 + 2/5 = 17/5
D = 5/4 - 1/2 = 5/4 - (1×2)/(2×2)
D = 5/4 - 2/4 = 3/4
E = 3/4 + 1/2 + 5/8 = (3×2)/(4×2) + (1×4)/(2×4) + 5/8
E = 6/8 + 4/8 + 5/8 = (6+4+5)/8 = 15/8
F = 3/4 - 2/3 = (3×3)/(4×3) - (2×4)/(3×4)
F = 9/12 - 8/12 = 1/12
Bonne soirée !
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Bonsoir,
A = 11/9 - 7/9
A = 4/9
B = 7/5 + 3/20
B = (7 x 4) / (5 x 4) + 3/20
B = 28/20 + 3/20
B = 31/20
C = 3 + 2/5
C = (3 x 5) / (1 x 5) + 2/5
C = 15/5 + 2/5
C = 17/5
D = 5/4 - 1/2
D = 5/4 - (1 x 2) / (2 x 2)
D = 5/4 - 2/4
D = 3/4
E = 3/4 + 1/2 + 5/8
E = (3 x 2) / (4 x 2) + (1 x 4) / (2 x 4) + 5/8
E = 6/8 + 4/8 + 5/8
E = 15/8
F = 3/4 - 2/3
F = (3 x 3) / (4 x 3) - (2 x 4) / (3 x 4)
F = 9/12 - 8/12
F = 1/12
Bonsoir,
Effectue les opérations suivantes
Méthode : on met les termes au même dénominateur si besoin puis on simplifie.
A = 11/9 - 7/9 = (11-7)/9 = 4/9
B = 7/5 + 3/20 = (7×4)/(5×4) + 3/20
B = 28/20 + 3/20 = 31/20
C = 3 + 2/5 = 15/15 + 2/5 = 17/5
D = 5/4 - 1/2 = 5/4 - (1×2)/(2×2)
D = 5/4 - 2/4 = 3/4
E = 3/4 + 1/2 + 5/8 = (3×2)/(4×2) + (1×4)/(2×4) + 5/8
E = 6/8 + 4/8 + 5/8 = (6+4+5)/8 = 15/8
F = 3/4 - 2/3 = (3×3)/(4×3) - (2×4)/(3×4)
F = 9/12 - 8/12 = 1/12
Bonne soirée !