Oblicz w pamieci : a) -12 + (-11)= -50 + 25 = -101 + (-120)= b) -7 + 42= -101+84 = -106 + 120 = C)  -16+3= 99(-19)= -27 + 31=  PLIS ! DAM  NAJ :C

a) -12 + (-11 ) = -12 - 11 = -23 -50 + 25 = -25 -101 + (-120 )= -101 - 120 = - 221 b) -7 + 42 = 35 -101+ 84 = -17 -106 + 120 = 14  c) -16 + 3 = -13 99 * (-19 ) =- 1881 -27 + 31 = 4

a)  -12 + (-11)= -12-11= -23  -50 + 25 = -25  -101 + (-120)= -101-120= -221 b)  -7 + 42=35  -101+84 = -17  -106 + 120 = 14  C)  -16+3=  -13 99(-19)= -1881  -27 + 31= 4