Exercice n°1: Effectuer de deux façons différentes. A=11x(7+6) C=40x(40+3) B = 13x(100 - 2) D=(20-3)x15

Salut !

A = 11*(7+6) = 11*13 = 143

A = 11*(7+6) = 11*7 + 11*6 = 77 + 66 = 143

B = 40*(40+3) = 40*43 = 1720

B = 40*(40+3) = 40*40 + 40*3 = 1600 + 120 = 1720

C = 13*(100-2) = 13*98 = 1274

C = 13*(100-2) = 13*100 - 13*2 = 1300 - 26 = 1274

D = (20-3)*15 = 17*15 = 255

D = (20-3)*15 = 20*15 - 3*15 = 300 - 45 = 255