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Laureeeette
@Laureeeette
April 2019
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Bonjour, je n'arrive pas a faire mon devoirs de math. Du moins celui de ma sœur, c'est niveau 5e. Merci de l'aide.
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tutti78
Salut :)
Exercice 1
1. 44 ÷ 80 = ( 11 x 4 ) ÷ ( 20 x 4 ) = 11 ÷ 20
21 ÷ 150 = ( 7 x 3 ) ÷ ( 50 x 3 ) = 7 ÷ 50
38 ÷ 200 = ( 19 x 2 ) ÷ ( 100 x 2 ) = 19 ÷ 100
27 ÷ 225 = ( 3 x 9 ) ÷ ( 25 x 9 ) = 3 ÷ 25
2. 11 ÷ 20 = ( 11 x 5 ) ÷ ( 20 x 5 ) = 55 ÷ 100
7 ÷ 50 = ( 7 x 2 ) ÷ ( 50 x 2 ) = 14 ÷ 100
19 ÷ 100
3 ÷ 25 = ( 3 x 4 ) ÷ ( 25 x 4 ) = 12 ÷ 100
27 ÷ 225 < 7 ÷ 50 < 19 ÷ 100 < 44 ÷ 80
4. Industrie < Irrigation < Eau potable < Production d'energie
exercice 2
Je te laisse juste les justifications a faire ^^
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tutti78
Pas de pb ^^
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Exercice 1
1. 44 ÷ 80 = ( 11 x 4 ) ÷ ( 20 x 4 ) = 11 ÷ 20
21 ÷ 150 = ( 7 x 3 ) ÷ ( 50 x 3 ) = 7 ÷ 50
38 ÷ 200 = ( 19 x 2 ) ÷ ( 100 x 2 ) = 19 ÷ 100
27 ÷ 225 = ( 3 x 9 ) ÷ ( 25 x 9 ) = 3 ÷ 25
2. 11 ÷ 20 = ( 11 x 5 ) ÷ ( 20 x 5 ) = 55 ÷ 100
7 ÷ 50 = ( 7 x 2 ) ÷ ( 50 x 2 ) = 14 ÷ 100
19 ÷ 100
3 ÷ 25 = ( 3 x 4 ) ÷ ( 25 x 4 ) = 12 ÷ 100
27 ÷ 225 < 7 ÷ 50 < 19 ÷ 100 < 44 ÷ 80
4. Industrie < Irrigation < Eau potable < Production d'energie
exercice 2
Je te laisse juste les justifications a faire ^^
25 / 34 0
154 56 5 /
/ 6 / 1
8 / 52 12