Addition Facts: The Elevens
11
+
0
=
11
11
+
1
=
12
11
+
2
=
13
11
+
3
=
14
11
+
4
=
15
11
+
5
=
16
11
+
6
=
17
11
+
7
=
18
11
+
8
=
19
11
+
9
=
20
11
+
10
=
21
11
+
11
=
22
11
+
12
=
23
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© 1999 by S&S Software.