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vivefia
@vivefia
January 2021
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svp c'est pour demain, encore merci a tous pour votre aide, c'est un dernier ex que je posteras aujourd'hui... Les maths c'est franchement pas mon truc, ce serais sympa merci d'avance;;
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maudmarine
Verified answer
Bonsoir,
a) 45/14 x 49/60 = 2205/840 = 105 x 21 / 105 x 8 =
21/8
b) 5/3 x 4/5 = 20/15 = 5 x 4 / 5 x 3 =
4/3
c) 45/26 x 65/72 = 2925/1872 = 117 x 25 / 117 x 16 =
25/16
d) 2 x 9/6 = 18/6 = 6 x 3 / 6 x 1 =
3
e) 7/6 x 6/7 = 42/42 =
1
f) 12,4/6 x 8 = 99,2/6 = 99,2 x 10 / 6 x 10 = 992/60 = 4 x 248 / 4 x 15 =
248/15
g) 2,5/3 x 3/0,5 = 7,5/1,5 = 7,5 x 10 / 1,5 x 10 = 75/15 = 15 x 5 / 15 x 1 =
5
h) 5,6 x 9/0,7 = 50,4/0,7 = 50,4 x 10 / 0,7 x 10 = 504/7 = 7 x 72 / 7 x 1 =
72
i) 0,55 x 2/11 = 1,1/11 = 1,1 x 10 / 11 x 10 =
11/100
j) 25/27 x 6/15 = 150/405 = 15 x 10 / 15 x 27 =
10/27.
2 votes
Thanks 2
Christine17
A
3x3x5x7x7/2x7x5x4x3=3x7/2x4=21/8
b
4/3
c
3x3x5x5x13/13x2x2x2x2x3x3=5x5/2x2x2x2=25/16
d
18/6=3
e
42/42=1
f
124/60x8=124x2/15=248/15
g
5x0,5x3/3x0,5=5
h
8x0,7x9/0,7=8x9=72
i
0,55x2/0,55x20=1/10
j
5x5x3x2/3x3x3x3x5=5x2/3x3x3=10/27
0 votes
Thanks 1
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vivefia
January 2021 | 0 Respostas
cc tout le monde, pouvez vous m'aidez pour cet ex svp: Un primeur a vendu les 2/3 de ses salades le et les 7/8 du reste l'apres midi. a) quelle fraction de ses salades lui reste t il a midi? b) quelle fraction de ses salades le primeur a t il vendue l'apres midi?
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vivefia
January 2021 | 0 Respostas
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vivefia
January 2021 | 0 Respostas
http://zoneur.sesamath.net/imgs_produites/vign/cycle4_2016/76335-1.gif pouvez vous m'aider svp ce serais sympa merci
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vivefia
January 2021 | 0 Respostas
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vivefia
January 2021 | 0 Respostas
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vivefia
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vivefia
January 2021 | 0 Respostas
Effectue les calculs suivants et simplifie si possible: 1/2 + 1/4= 5/6 + 5/12= 13/14 + 5/7= 3/4 + 5/24= SVP aidez moi j'y comprend rien, je suis trop nulle en maths pour demain svp
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vivefia
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Lista de comentários
Verified answer
Bonsoir,a) 45/14 x 49/60 = 2205/840 = 105 x 21 / 105 x 8 = 21/8
b) 5/3 x 4/5 = 20/15 = 5 x 4 / 5 x 3 = 4/3
c) 45/26 x 65/72 = 2925/1872 = 117 x 25 / 117 x 16 = 25/16
d) 2 x 9/6 = 18/6 = 6 x 3 / 6 x 1 = 3
e) 7/6 x 6/7 = 42/42 = 1
f) 12,4/6 x 8 = 99,2/6 = 99,2 x 10 / 6 x 10 = 992/60 = 4 x 248 / 4 x 15 = 248/15
g) 2,5/3 x 3/0,5 = 7,5/1,5 = 7,5 x 10 / 1,5 x 10 = 75/15 = 15 x 5 / 15 x 1 = 5
h) 5,6 x 9/0,7 = 50,4/0,7 = 50,4 x 10 / 0,7 x 10 = 504/7 = 7 x 72 / 7 x 1 = 72
i) 0,55 x 2/11 = 1,1/11 = 1,1 x 10 / 11 x 10 = 11/100
j) 25/27 x 6/15 = 150/405 = 15 x 10 / 15 x 27 = 10/27.
3x3x5x7x7/2x7x5x4x3=3x7/2x4=21/8
b
4/3
c
3x3x5x5x13/13x2x2x2x2x3x3=5x5/2x2x2x2=25/16
d
18/6=3
e
42/42=1
f
124/60x8=124x2/15=248/15
g
5x0,5x3/3x0,5=5
h
8x0,7x9/0,7=8x9=72
i
0,55x2/0,55x20=1/10
j
5x5x3x2/3x3x3x3x5=5x2/3x3x3=10/27