Advertisement

SUBTRACTION Self-Correcting Quiz - Up Through the TWOS

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