SAIDA20 SAIDA20 Mathématiques Answered 1 Recopier et compléter. a) (+1,2) + (-3,4)= c) (-3) + (+8)= b) (-12) + (-15) = d) (+0,5) + (-0,5) = 2 Recopier et compléter. a) (+1,2)-(-3,4)= c) (-3) - (+8)= b) (-12)-(-15) = d) (+0,5)-(-0,5) =