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Réponse :
Bonjour
a) A = 5/6 + (-1/3)
A = 5/6 + (-1 × 2)/(3×2)
A= 5/6 - 2/6 = 3/6
A= (3×1)/(3×2)
A =1/2
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b) B = 7/9 - (-1/27)
B = 7/9 + 1/27
B = (3 × 7) /(3 × 9) + 1/27
B = 21/27 + 1/27
B = 22/27
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c) C = (-7/6) + 2/6 = (-5/6)
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d) D = 45/15 - 7/3
D = 45/15 - (7 × 5)/(3 ×5)
D = 45/15 - 35/15
D = 10/15
D = (5 × 2)/ (5× 3)
D = 2/3
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e) E = 4/11 + 2
E =4/11 + 2/1
E = 4/11 + (2 × 11) /(1 × 11)
E = 4/11 + 2/11
E = 6/11
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f) F = 4/18 + 5/27
F = (2 × 2)/ (2 × 9) + 5/27
F = 2/9 + 5/27
F = (2 × 3) / (3 × 9) + 5/27
F = 6/27 + 5/27
F = 11/27
Bonjour;
a)
5/6 -1/3*2/2
= 5/6 -2/6
= 3/6
b)
7/9*3/3 +1/27
= 21/27+1/27
= 22/27
c)
-7/6 +2/6
= -5/6
d)
45/15 -7/3*5/5
= 45/15-35/15
= 10/15 = 2/3
e)
4/11 +2*11/11
= 4/11 +22/11
= 26/11
f)
4/18*3/3 +5/27* 2/2
= 12/54 +10/54
= 22/54 = 11/27