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Java Games: Matching, concentration, word search, and flashcards.

Subtracting 9 Facts

Let the trick help you if these are not stuck in your brain.

AB
18-9=9
17-9=88
16-9=7
15-9=6
14-9=5
13-9=4
12-9=3
11-9=2
10-9=1
19-9=10