Java Games: Flashcards, matching, concentration, and word search.

Subtraction Doubles -1

AB
2-1=1
3-2=1
4-3=1
5-4=1
6-5=1
7-6=1
8-7=1
9-8=1
10-9=1
11-10=1
12-11=1
13-12=1



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