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SUBTRACTION Self-Correcting Quiz - SEVENS

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