Subtraction Facts: The Nines
9
-
9
=
0
10
-
9
=
1
11
-
9
=
2
12
-
9
=
3
13
-
9
=
4
14
-
9
=
5
15
-
9
=
6
16
-
9
=
7
17
-
9
=
8
18
-
9
=
9
19
-
9
=
10
20
-
9
=
11
21
-
9
=
12
Arithmetic Fact Pages, compliments of S&S Software. (http://www.sssoftware.com).
© 1999 by S&S Software.