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SUBTRACTION Self-Correcting Quiz - Up Through the ONES

1
10
-  1
2
6
-  0
3
2
-  0
4
6
-  1
5
9
-  1
6
1
-  0
7
8
-  1
8
9
-  0
9
7
-  0
10
7
-  1
11
5
-  1
12
8
-  0
13
5
-  0
14
0
-  0
15
2
-  1
16
3
-  1
17
4
-  0
18
3
-  0
19
4
-  1
20
1
-  1
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