Calcule sans calculatrice les expressions suivantes :

A = 3 x 2⁴ + 5 x 4³

B = 1+10+10² +10₃ + 10⁴ + 10⁵

C = 1-3² x (-5)²

D = 2₃ x (-9) + 3₃ - (5²+2-¹) Merci d'avance


1
A = 3 x 2⁴ + 5 x 4³
A = 3 x 16 + 5 x 64
A = 48 + 320 = 368

B = 1+10+10² +10₃ + 10⁴ + 10⁵
B = 11 + 100 +1000 +10000+ 100000 = 111 111

C = 1-3² x (-5)²
c = 1 -9 x 25
C = 1- 225 = 224

D = 2₃ x (-9) + 3₃ - (5²+2-¹)
D =( 8 x -9 ) + 27 - (25 + 0.5)
D = -72 + 27 -25 -0.5
D = -97.5 +27 = -70.5

Réponses

Meilleure réponse !
2013-12-26T15:41:56+01:00
Bonjour

A = 3 x 2⁴ + 5 x 4³
A = 3 x 16 + 5 x 64
A = 48 + 320 = 368

B = 1+10+10² +10₃ + 10⁴ + 10⁵
B = 11 + 100 +1000 +10000+ 100000 = 111 111

C = 1-3² x (-5)²
c = 1 -9 x 25
C = 1- 225 = 224

D = 2₃ x (-9) + 3₃ - (5²+2-¹)   
D =( 8 x -9 ) + 27 - (25 + 0.5)
D = -72 + 27 -25 -0.5
D = -97.5 +27 = -70.5

   Merci d'avance