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chloecros2005
@chloecros2005
January 2021
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bonjour pouvez m'aider sur ce devoir niveau 5eme je ne comprends rien:
En utilisant les critères de divisibilité, écrire les numérateurs et dénominateurs des fractions ci-dessous comme des produits, puis simplifier ces fractions:
a.15/25 b.32/24 c.111/74 d.4/22
e.18/27 f.42/35 g.14/24 h.50/45
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gsantha
Bonjour
a. 15 / 25
= (5 x 3) / (5 x 5)
= 3 / 5
b. 32 / 24
= (4 x 8) / (3 x 8)
= 4 / 3
c. 111 / 74
= (37 x 3) / (37 x 2)
= 3 / 2
d. 4 / 22
= (2 x 2) / (11 x 2)
= 2 / 11
e. 18 / 27
= (9 x 2) / (9 x 3)
= 2 / 3
f. 42 / 35
= (7 x 6) / (7 x 5)
= 6 / 5
g. 14 / 24
= (7 x 2) / (12 x 2)
= 7 / 12
h. 50 / 45
= (5 x 10) / (5 x 9)
= 10 / 9
Voilà j'espère avoir pu t'aider ^^
6 votes
Thanks 10
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Lista de comentários
a. 15 / 25
= (5 x 3) / (5 x 5)
= 3 / 5
b. 32 / 24
= (4 x 8) / (3 x 8)
= 4 / 3
c. 111 / 74
= (37 x 3) / (37 x 2)
= 3 / 2
d. 4 / 22
= (2 x 2) / (11 x 2)
= 2 / 11
e. 18 / 27
= (9 x 2) / (9 x 3)
= 2 / 3
f. 42 / 35
= (7 x 6) / (7 x 5)
= 6 / 5
g. 14 / 24
= (7 x 2) / (12 x 2)
= 7 / 12
h. 50 / 45
= (5 x 10) / (5 x 9)
= 10 / 9
Voilà j'espère avoir pu t'aider ^^