Friends of Five
3
+
=
5
2
+
=
5
4
+
=
5
1
+
=
5
2
+
=
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
2
+
7
=
10
+
5
=
18
+
5
=
14
+
4
=
20
+
9
=
10
+
20
=
19
+
3
=
23
+
4
=
5
+
11
=
13
+
3
=
Subtraction
8
-
3
=
10
-
5
=
16
-
5
=
14
-
4
=
10
-
9
=
20
-
10
=
19
-
3
=
16
-
4
=
15
-
4
=
15
-
3
=