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Nynna
@Nynna
January 2021
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Bonjour gros DM de maths il me manque que cet exercice : Calculer et donner les resultats sous forme scientifique
(7X10^7) + (2,8X10^8)
(7X10^7) - (2,8X10^8)
(7X10^7) ÷ (2,8X10^8)
(4X10^-4)×(85X10^-5)
(4X10^-4)+(85X10^-5)
(4X10^-4)-(85X10^-5)
(4X10^-4)÷(85X10^-5)
J'espère que vous pourrez m'aider ! C'est le seul exercice que je n'arrive pas à faire !
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BravoTeam
(7X10^7) + (2,8X10^8)=70 000 000+280 000 000=350 000 000=3,5*10^8
(7X10^7) - (2,8X10^8)=70 000 000-280 000 000=-210 000 000=-2,1*10^8
(7X10^7) ÷ (2,8X10^8)=70 000 000÷280 000 000=0,25=2,5*10^-1
(4X10^-4)×(85X10^-5)=0,0004*0,00085=0,00000034=3,4*10^-7
(4X10^-4)+(85X10^-5)=0,0004+0,00085=0,00125=1,25*10^-3
(4X10^-4)-(85X10^-5)=0,0004-0,00085=-0,00045=4,5*10^-4
(4X10^-4)÷(85X10^-5)=0,0004÷0,00085=0,47=4,7*10^-1
-good luck mate
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Lista de comentários
(7X10^7) - (2,8X10^8)=70 000 000-280 000 000=-210 000 000=-2,1*10^8
(7X10^7) ÷ (2,8X10^8)=70 000 000÷280 000 000=0,25=2,5*10^-1
(4X10^-4)×(85X10^-5)=0,0004*0,00085=0,00000034=3,4*10^-7
(4X10^-4)+(85X10^-5)=0,0004+0,00085=0,00125=1,25*10^-3
(4X10^-4)-(85X10^-5)=0,0004-0,00085=-0,00045=4,5*10^-4
(4X10^-4)÷(85X10^-5)=0,0004÷0,00085=0,47=4,7*10^-1
-good luck mate