答案
解:(1)19+(-24)=-(24-19)=-5;
(2)-3-(-4)+7=-3+4+7=-3+11=8;
(3)14-25-(-12)-17=14-25+12-17=26-42=-12;
(4)43-26+13-24-46=56-96=-40;
(5)-23+18-1-15+2=20-49=-29;
(6)-
-
+
-
=1-
=-
.
解:(1)19+(-24)=-(24-19)=-5;
(2)-3-(-4)+7=-3+4+7=-3+11=8;
(3)14-25-(-12)-17=14-25+12-17=26-42=-12;
(4)43-26+13-24-46=56-96=-40;
(5)-23+18-1-15+2=20-49=-29;
(6)-
-
+
-
=1-
=-
.