
+9
-21
+25
+25
-29
-70

(3+9+5)= -17
(1+20+8)= -29
(11+7+12)= -30
(6+9+10)= +25
(21+3+18)= -42
(4+15+25)= -44

-11

-200+300=-500

+7
-16
-13
+21
-15
+41
-25
-29
+31
+9
-21
+25
+25
-29
-70
(3+9+5)= -17
(1+20+8)= -29
(11+7+12)= -30
(6+9+10)= +25
(21+3+18)= -42
(4+15+25)= -44
-11
-200+300=-500
+7
-16
-13
+21
-15
+41
-25
-29
+31