Friends of Five
3
+
=
5
1
+
=
5
5
+
=
5
2
+
=
5
4
+
=
5
5
+
=
5
1
+
=
5
3
+
=
5
2
+
=
5
0
+
=
5
Buddies to Ten
9
+
=
10
7
+
=
10
6
+
=
10
3
+
=
10
1
+
=
10
2
+
=
10
8
+
=
10
4
+
=
10
2
+
=
10
10
+
=
10
Adding
9
+
3
=
10
+
6
=
17
+
5
=
13
+
4
=
20
+
9
=
20
+
10
=
17
+
4
=
23
+
5
=
12
+
3
=
14
+
3
=
Subtraction
6
-
3
=
10
-
6
=
14
-
3
=
17
-
4
=
11
-
9
=
30
-
10
=
14
-
3
=
15
-
4
=
18
-
4
=
25
-
3
=