Bonjour, Svp help me. C'est pour demain, maths fractions multiplication. Besoin d'aide au 12 et au 11. Merci beaucouuuup à celui ou celle qui m'aide.
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Bonjour
Exercice 11
A = (5/5-1/5)(5/5-2/5)(5/5-3/5)(5/5-4/5)(5/5-5/5)(5/5-6/5)
A = (4/5)(3/5)(2/5)(1/5)(0)(-1/5)
A = 0
B = (2 -2/2)(2-3/3)(2-4/4)(5/5-2)(5/5-2)
= (2-1)(2-1)(2-1)(1-2)(1-2)
= (1)(1)(1)(-1)(-1)
= 1
Exercice 12
A )
3x-7/15 = -21/15 = -7/5
B )
7/15 x -15/3 = -7/3
Opposé 7/3
C)
5/11 x 11/15 x 2
5/15 x 2
1/3 x 2
2/3
D)
-7/10 x 2/10 = -14/100 = -7 /50
E)
-7/10 + 4/5 =- 7/10 + 8/10 = 1/10 =
Inverse 10
F)
7/15 x -15/4 = -7/4
Inverse -4/7
G)
- 7/15 x -15/2 = 7/2
Opposé -7/2
H)
-7/2( -7/3 x -3/2)
-7/2(-7/2)
49/4