Exercice 1

Range les nombres suivants dans l�??ordre croissant :

 a) - 3	- 7	- 2	- 4	 -1
 b) -2,5	0	+ 5,2	-2,7	+5,15

Exercice 2

Effectue (sans calculatrice) les calculs suivants :

 A = ( - 3 ) + ( - 4 ) =
 B = ( + 5 ) + ( - 7 ) =
 C = ( - 8 ) + ( + 1 ) =
 D = (- 10 ) + ( - 9 ) =
 E = 9 �?? 15 =
 F = - 7 + 9 =
 G = - 10 �?? 18 =
 H = + 7 �?? 12 =

Exercice 3

Effectue (sans calculatrice) les calculs suivants :

 A = ( + 7,5 ) + ( - 1,2 ) + ( - 5,3 )  + ( - 1 )
 B = 4,07 �?? 2,03 + 2,01 �?? 4,8
 C = - ( - 2 �?? 1 ) �?? ( 6 �?? 8 ) + ( - 3 - 2 )
 D = - ( - 1 ) �?? ( + 7 ) �?? ( - 2 ) + ( - 10 )
 E = [ - 1 �?? ( 4 �?? ( - 2 ) ) ] + ( - 2 + 3 )
 F = - ( 7 + ( 7 �?? ( - 7 �?? ( - 7 + ( - 7 )))))

Exercice 4

Effectue (sans calculatrice) les calculs suivants :

A= �?? 1 × (-1) = B = 5 &time; 6 = C= �?? 7 &time; (-7) = D = �?? 6 &time; 9 = E = �?? 11 &time; (-8) F = -10 &time; 2 &time; (-2) &time; 5 &time; (-3) &time; (-5) &time; (-7) G= D = -1 &time; (-2) &time; (-3) &time; 5 &time; 10 H = -6 + 7 &time; (-3) �?? 6 &time; (-1) I = [-2 + (-9)] &time; [7 �?? (-6) &time; (-4)] J = = K = = L = = M = = N= =