☺ Salut ☺
⚫ Effectuons les calculs suivantes et donnons le résultat sous la forme d'une fraction simplifié :
•[tex]A = \dfrac{40}{63} \times \dfrac{63}{32}[/tex]
•[tex]A = \dfrac{40}{\cancel{63}} \times \dfrac{\cancel{63}}{32}[/tex]
•[tex]A = \dfrac{40}{32}[/tex]
•[tex]A = \dfrac{5 \times 8}{4 \times 8}[/tex]
•[tex]\boxed{\boxed{A = \dfrac{5}{4}}}[/tex]✅
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•[tex]B = \dfrac{63}{20} \times \dfrac{80}{63}[/tex]
•[tex]B = \dfrac{\cancel{63}}{20} \times \dfrac{80}{\cancel{63}}[/tex]
•[tex]B = \dfrac{80}{20}[/tex]
•[tex]\boxed{\boxed{B = 4}}[/tex]✅
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•[tex] C = \dfrac{2}{45} \times \dfrac{9}{4}[/tex]
•[tex] C = \dfrac{18}{180}[/tex]
•[tex] \boxed{\boxed{C = \dfrac{1}{10}}}[/tex]✅
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•[tex] D = \dfrac{64}{49} \times \dfrac{7}{48}[/tex]
•[tex] D = \dfrac{448}{2352} [/tex]
•[tex] D = \dfrac{4 \times \cancel{112}}{21 \times \cancel{112}} [/tex]
•[tex] \boxed{\boxed{D = \dfrac{4}{21}}}[/tex]✅
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•[tex] E = \dfrac{24}{49} \times \dfrac{7}{36} [/tex]
•[tex] E = \dfrac{168}{1764}[/tex]
•[tex] E = \dfrac{2 \times \cancel{84} }{21 \times \cancel{84}}[/tex]
•[tex]\boxed{\boxed{ E = \dfrac{2}{21}}}[/tex]✅
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•[tex] F = \dfrac{3}{28} \times \dfrac{20}{9} [/tex]
• [tex] F = \dfrac{60}{252}[/tex]
• [tex] F = \dfrac{5 \times \cancel{12}}{21 \times \cancel{12}}[/tex]
• [tex] \boxed{\boxed{F = \dfrac{5}{21}}}[/tex]✅
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•[tex] G = \dfrac{\cancel{48}}{25} \times \dfrac{5}{\cancel{48}} [/tex]
• [tex] G = \dfrac{5}{25}[/tex]
• [tex]\boxed{\boxed{ G = \dfrac{1}{5}}}[/tex]✅
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•[tex] H = \dfrac{10}{49} \times \dfrac{21}{25} [/tex]
•[tex] H = \dfrac{210}{1225} [/tex]
•[tex] H = \dfrac{6 \times \cancel{35}}{35 \times \cancel{35}}[/tex]
•[tex] \boxed{\boxed{H = \dfrac{6}{35}}}[/tex]✅
⚫ Effectuons :
1. [tex]\; - 10 + 8 = \boxed{- 2}[/tex]
2. [tex]\; - 6 + (- 2) = \boxed{- 8}[/tex]
3. [tex]\; - 7 + (- 9) = \boxed{- 16}[/tex]
4. [tex]\; 7 + \boxed{(- 4)} = 3[/tex]
5. [tex]\; 10 + \boxed{10} = 20[/tex]
6. [tex]\; 7 + (- 1) = \boxed{6}[/tex]
7. [tex]\; - 10 + \boxed{5} = - 5[/tex]
8. [tex]\; 7 - 8 = \boxed{- 1}[/tex]
9. [tex]\; 0 - (- 7) = \boxed{7}[/tex]
10. [tex]\; - 19 - \boxed{ (- 10)} = - 9[/tex]
11. [tex]\; - 6 - \boxed{(- 5)} = - 1[/tex]
12. [tex]\; - 10 - (- 3) = \boxed{- 7}[/tex]
13. [tex]\; - 5 - (- 3) = \boxed{- 2}[/tex]
14. [tex]\; - 5 - (- 8) = \boxed{3}[/tex]
15. [tex]\; - 6,2 + 8,7 = \boxed{2,5}[/tex]
16. [tex]\;\boxed{7,9} + 6,4 = 14,3[/tex]
17. [tex]\; 3 - (- 2,8) = \boxed{5,8}[/tex]
18. [tex]\; - 6,4 + (- 7,1) = \boxed{- 13,5}[/tex]
19. [tex]\; 13,5 - 9,3 = \boxed{4,2}[/tex]
20. [tex]\; 3,2 + (- 9) = \boxed{- 5,8}[/tex]
