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Lilou971
@Lilou971
May 2019
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Bonsoir à tous et à toutes j'aurais besoin de votre aide pour faire cet exercices de maths le 6 et 7 merci
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Exercice 6 :
f. 45/143 + 20/143
= 65/143
=
= 5/11
g. 1/27 + 4/27 + 7/27
= 12/27
=
= 4/9
h. 16/28 - 7/28 - 5/28
= 4/28
=
= 1/7
i. 13/19 - 5/19 + 6/19
= 8/19 + 6/19
= 14/19
Exercice 7 :
a. Pour x = 2
11/4 * 2/1 + 1/4 * 2/1
= 22/4 + 2/4
= 24/4
= 6
b. Pour x = 5
11/4 * 5/1 + 1/4 * 5/1
= 55/4 + 5/4
= 60/4
= 15
c. On remarque que
le résultat est le triple du nombre par lequel on remplace x
. En effet, lorsqu'on additionne 11/4x et 1/4x cela donne 3x :
11/4x + 1/4x
= 12/4x
= 3x
2 votes
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Verified answer
Exercice 6 :f. 45/143 + 20/143
= 65/143
=
= 5/11
g. 1/27 + 4/27 + 7/27
= 12/27
=
= 4/9
h. 16/28 - 7/28 - 5/28
= 4/28
=
= 1/7
i. 13/19 - 5/19 + 6/19
= 8/19 + 6/19
= 14/19
Exercice 7 :
a. Pour x = 2
11/4 * 2/1 + 1/4 * 2/1
= 22/4 + 2/4
= 24/4
= 6
b. Pour x = 5
11/4 * 5/1 + 1/4 * 5/1
= 55/4 + 5/4
= 60/4
= 15
c. On remarque que le résultat est le triple du nombre par lequel on remplace x. En effet, lorsqu'on additionne 11/4x et 1/4x cela donne 3x :
11/4x + 1/4x
= 12/4x
= 3x