10
-
5
=
____________________
4
-
____________________
=
2
15
-
____________________
=
15
____________________
-
3
=
4
8
-
3
=
____________________
9
-
____________________
=
7
____________________
-
1
=
10
5
-
4
=
____________________
____________________
-
6
=
2
10
-
2
=
8
