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NadiaLcq
@NadiaLcq
June 2021
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Bonjour j'ai un probléme avec ses calculs pouvez-vous m'aider ? Je suis en 4eme ;)
Vous n'etes pas oubliger de faire tous les exercices seulement ceux ou vous y arriver
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winner123
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Bonjour
A = 1/10 +1/2 : 10/3
A = 1/10 + 1/2 x 3/10
A = 1/10 + 3/20
A= 2/20 +3/20 =5/20 =
1/4
B = 1/7 - 8/21 x 3/5
B = 1/7- 8/7 x 1/5
B = 1/7 - 8/35
B = 5/35 -8/35 =
- 3/35
C = 1/3 x 5/7 - 5/14 : 3/2
C = 5/21 - 5/14 x 2/3
C = 5/21 - 10/42
C = 10/42 - 10/42 =
0
N°7
a) -3/5 +5/6 = - 18/30 + 25/30 =
7/30
b) 17/6 -8/6 = 9/6 =
3/2
c)1/15 +4/5 -3/10 = 2/30 + 24/30 - 9/30 =
17/30
d) 3/8 -5/4 =3/8 - 10/8 =
-7/8
e) 5/7 x 4/3 =
20/21
f) 35/8 x 4/30 = 7/2 x 1/6 =
7/12
g) 15/4 x 16/-3 x -2/5 = -40/-5 =
8
h) 1/2 : 4/13 = 1/2 x 13/4 =
13/8
i) (-4/25) : -2/5 = -4/25 x -5/2 = 20/50 =
2/5
j) 3/4 +5/4 x 7/15 = 3/4 + 7/12 = 9/12 + 7/12 = 16/12 =
4/3
N°8
a) (2/3 -3) : 1/9 = (2/3 - 9/3) x 9 = -6/3 x 9 = - 54/3
= -18
b) 5 + (1+1/8) : 3/4 = 5+(8/8+1/8) : 3/4 = 5 +9/8 x 4/3 = 5 + 36/24 = 120/24 + 36/24 = 156/24 =
13/2
c) 12/5 - 3/5 x 7/9 = 12/5 - 21/45 = 108/45 -21/45 = 87/45 =
29/15
celui de géométrie est à construire
1 votes
Thanks 2
NadiaLcq
Merci tt le monde <3 :D
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Je suis en 4eme c'est TRES URGENT je n'y arrive pas pouvez-vous m'aider SVPVous etes pas oubliger de faire tout si vous n'y arriver pas ;)
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Verified answer
BonjourA = 1/10 +1/2 : 10/3
A = 1/10 + 1/2 x 3/10
A = 1/10 + 3/20
A= 2/20 +3/20 =5/20 = 1/4
B = 1/7 - 8/21 x 3/5
B = 1/7- 8/7 x 1/5
B = 1/7 - 8/35
B = 5/35 -8/35 = - 3/35
C = 1/3 x 5/7 - 5/14 : 3/2
C = 5/21 - 5/14 x 2/3
C = 5/21 - 10/42
C = 10/42 - 10/42 = 0
N°7
a) -3/5 +5/6 = - 18/30 + 25/30 = 7/30
b) 17/6 -8/6 = 9/6 = 3/2
c)1/15 +4/5 -3/10 = 2/30 + 24/30 - 9/30 = 17/30
d) 3/8 -5/4 =3/8 - 10/8 = -7/8
e) 5/7 x 4/3 = 20/21
f) 35/8 x 4/30 = 7/2 x 1/6 = 7/12
g) 15/4 x 16/-3 x -2/5 = -40/-5 = 8
h) 1/2 : 4/13 = 1/2 x 13/4 = 13/8
i) (-4/25) : -2/5 = -4/25 x -5/2 = 20/50 = 2/5
j) 3/4 +5/4 x 7/15 = 3/4 + 7/12 = 9/12 + 7/12 = 16/12 = 4/3
N°8
a) (2/3 -3) : 1/9 = (2/3 - 9/3) x 9 = -6/3 x 9 = - 54/3 = -18
b) 5 + (1+1/8) : 3/4 = 5+(8/8+1/8) : 3/4 = 5 +9/8 x 4/3 = 5 + 36/24 = 120/24 + 36/24 = 156/24 = 13/2
c) 12/5 - 3/5 x 7/9 = 12/5 - 21/45 = 108/45 -21/45 = 87/45 = 29/15
celui de géométrie est à construire