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SUBTRACTION Self-Correcting Quiz - ZEROS

1
3
-  0
2
4
-  0
3
9
-  0
4
5
-  0
5
4
-  0
6
3
-  0
7
8
-  0
8
6
-  0
9
2
-  0
10
7
-  0
11
2
-  0
12
7
-  0
13
6
-  0
14
9
-  0
15
1
-  0
16
8
-  0
17
5
-  0
18
1
-  0
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