30/31×(0.8+5/3)=?????????
Mathématiques
asma123
Question
30/31×(0.8+5/3)=?????????
2 Réponse
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1. Réponse MathieuM
30/31 x (0,8 + 5/3) = 30/31 x (4/5 + 5/3)
= 30/31 x (12/15 + 25/15)
= 30/31 x (37/15)
= 1110/465 = 222/93 -
2. Réponse Anonyme
[tex]30/31*(0.8+5/3) \\ =30/31*(4/5+5/3) \\ =30/31*((4*3)/(5*3)+(5*5)/(3*5)) \\ =30/31*(12/15+25/15) \\ =30/31*37/15 \\ =(30*37)/(31*15) \\ =1.110/465 \\ =(15*74)/(15*31) \\ =74/31[/tex]