-
2
+
1
=
-
____________________
;
5
-
9
=
-
____________________
;
4
-
4
=
____________________
;
0
-
7
=
-
____________________
;
-
6
+
3
=
-
____________________
;
-
3
+
10
=
____________________
;
15
-
17
=
-
____________________
;
-
9
-
0
=
-
____________________
;
7
+
5
=
____________________
;
-
6
-
5
=
-
____________________
;
9
-
13
=
-
____________________
;
-
5
+
12
=
____________________
;
-
9
-
7
=
-
____________________
;
-
8
+
7
=
-
____________________
;
-
5
+
5
=
____________________
;
-
3
+
16
=
____________________
;
