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AgathaChristie15
@AgathaChristie15
May 2019
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Bonjour! Je suis en 4ème et j'aurais besoin d'aide pour l'exercice 3 svp
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A/ 5/3 - 6/5 = 25/15 - 18/15 =
7/15
B = 3/7 - 2/7 x 21/8
= 3/7 - 42/ 56
= 24/56 - 42/56
= - 18/56 =
- 9/ 28
C est coupé
a) 65 100 000 = 6.51 x 10 ⁷
0.025 = 2.5 x 10 ⁻²
0.57 x 10 ² = 5.7 x 10
D = 8 x 10 ⁵ x 3 x 10 ⁴
D = 24 x 10 ⁹ =
2.4 x 10 ¹⁰
E = 16 x 10 ⁶ x 3 x 10 ⁻⁸ sur 2 x 10 ⁵
E = 48 x 10 ⁻² sur 2 x 10 ⁵
E = 24 x 10 ⁻⁷ =
2.4 x 10 ⁻⁶
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Verified answer
A/ 5/3 - 6/5 = 25/15 - 18/15 = 7/15B = 3/7 - 2/7 x 21/8
= 3/7 - 42/ 56
= 24/56 - 42/56
= - 18/56 = - 9/ 28
C est coupé
a) 65 100 000 = 6.51 x 10 ⁷
0.025 = 2.5 x 10 ⁻²
0.57 x 10 ² = 5.7 x 10
D = 8 x 10 ⁵ x 3 x 10 ⁴
D = 24 x 10 ⁹ = 2.4 x 10 ¹⁰
E = 16 x 10 ⁶ x 3 x 10 ⁻⁸ sur 2 x 10 ⁵
E = 48 x 10 ⁻² sur 2 x 10 ⁵
E = 24 x 10 ⁻⁷ = 2.4 x 10 ⁻⁶