Calculer astucieusement : Exemple : A= 199*26+26 = 200*26=5200 A= 158*48.7-48.7*59+48.7= B= 58*27+58*72+58 =
Mathématiques
lolmdr2
Question
Calculer astucieusement :
Exemple : A= 199*26+26 = 200*26=5200
A= 158*48.7-48.7*59+48.7=
B= 58*27+58*72+58 =
Exemple : A= 199*26+26 = 200*26=5200
A= 158*48.7-48.7*59+48.7=
B= 58*27+58*72+58 =
1 Réponse
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1. Réponse SoniaBzb
A= 158*48.7 -48.7*59 +48.7= (158 + 1) x 48.7 - 59 x 48.7 = 159 x 48.7 - 59 x 48.7 = 159-59 x (48.7) = 100x48.7 = 4870
B= 58*27+ 58*72 +58 = 58 x (27 + 72 + 1) = 58 x 100 = 5800