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Meilleure réponse !
  • Utilisateur Brainly
2013-12-26T11:55:25+01:00
A = 5 x ( 3.6 + 7 )
A = ( 5 x 3.6 ) + ( 5 x 7 )
A = 18 + 35 
A = 53

B = 10 x ( 12.8 - 5 )
B = ( 10 x 12.8 ) - ( 10 x 5 )
B = 128 - 50
B = 78

C = 62.8 x 15.7 + 37.2 x 15.7
C = ( 62.8 x 15.7 ) + ( 37.2 x 15.7 )
C = 985.96 + 584.04
C = 1570

D = 8.3 x 150 - 50 x 8.3
D = ( 8.3 x 150  ) - ( 50 x 8.3 ) 
D = 1245 - 415
D = 830