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SUBTRACTION Self-Correcting Quiz - EIGHTS

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