Question

a) calculati in modul cel mai rational
-9+(-13)+17+(-6)+11
14+(-8)+(-25)+12+7
43-60+12+39-21

Answer 1

-9-13+17-6+11=
-22+17-6+11=
-5-6+11=-11+11=0

14-8-25+12+7=
6-25+12+7=
-19+12+7=
-7+7=0

43-60+12+39-21=
-17+12+39-21=
-5+39-21=
34-21=13