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Anoush
@Anoush
June 2021
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Bonjour,pourriez vous m'aidez svp c'est pour lundi c'est un DM de Maths.
Exercice 87
Exercice 99
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maudmarine
Verified answer
87)
1)
a)
5 x 8 x 2
=
40 x 2
= 80/30 = 10 x 8 / 10 x 3 =
8/3
2 x 3 x 5 6 x 5
b) 42/72 = 6 x 7 / 6 x 12 =
7/12
c) 120/360 = 120 x 1 / 120 x 3 =
1/3
2)
a) 3/2 + 2/3 = 3 x 3 / 2 x 3 + 2 x 2 / 3 x 2 = 9/6 + 4/6 =
13/6
b) 8/5 - 3/4 = 8 x 4 / 5 x 4 - 3 x 5 / 4 x 5 = 32/20 - 15/20 =
17/20
c) - 7/12 x 4/3 = - 28/36 = 4 x - 7 / 4 x 9 =
- 7/9
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Verified answer
87)1)
a) 5 x 8 x 2 = 40 x 2 = 80/30 = 10 x 8 / 10 x 3 = 8/3
2 x 3 x 5 6 x 5
b) 42/72 = 6 x 7 / 6 x 12 = 7/12
c) 120/360 = 120 x 1 / 120 x 3 = 1/3
2)
a) 3/2 + 2/3 = 3 x 3 / 2 x 3 + 2 x 2 / 3 x 2 = 9/6 + 4/6 = 13/6
b) 8/5 - 3/4 = 8 x 4 / 5 x 4 - 3 x 5 / 4 x 5 = 32/20 - 15/20 = 17/20
c) - 7/12 x 4/3 = - 28/36 = 4 x - 7 / 4 x 9 = - 7/9