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SUBTRACTION Self-Correcting Quiz - SEVENS

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