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Addition/Subtraction to 20
0
%
0
0
0
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2 + 6
4
10
11
8
Oops!
Okay!
9 + 3
14
16
12
15
Oops!
Okay!
4 + 8
14
13
11
12
Oops!
Okay!
7 + 8
14
12
13
15
Oops!
Okay!
6 + 7
10
13
11
12
Oops!
Okay!
11 - 4
4
6
2
7
Oops!
Okay!
18 - 6
12
11
10
9
Oops!
Okay!
16 - 8
6
8
3
2
Oops!
Okay!
10 + 5
16
13
12
15
Oops!
Okay!
10 - 3
7
5
1
9
Oops!
Okay!
17 - 8
6
4
5
9
Oops!
Okay!
12 + 5
16
17
19
18
Oops!
Okay!
15 - 7
8
4
6
9
Oops!
Okay!
5 + 9
12
10
11
14
Oops!
Okay!
9 + 9
18
17
15
14
Oops!
Okay!
8 + 7
17
16
14
15
Oops!
Okay!
5 + 7
13
11
15
12
Oops!
Okay!
15 - 9
6
5
4
8
Oops!
Okay!
10 + 9
18
1
19
20
Oops!
Okay!
19 - 7
11
10
12
9
Oops!
Okay!
20 - 10
11
2
9
10
Oops!
Okay!
11 + 7
19
16
18
15
Oops!
Okay!
1 + 9
10
6
7
8
Oops!
Okay!
9 + 4
13
9
12
10
Oops!
Okay!
6 + 6
16
12
15
14
Oops!
Okay!
2 + 7
11
10
9
12
Oops!
Okay!
7 + 5
13
12
10
11
Oops!
Okay!
17 - 5
11
9
12
10
Oops!
Okay!
3 + 9
10
5
11
12
Oops!
Okay!
1 + 8
4
7
6
9
Oops!
Okay!
5 + 8
13
16
12
14
Oops!
Okay!
13 - 5
5
8
7
4
Oops!
Okay!
18 - 9
6
3
9
5
Oops!
Okay!
16- 7
6
1
9
5
Oops!
Okay!
10 - 2
8
4
7
6
Oops!
Okay!
4 + 7
11
6
8
7
Oops!
Okay!
15 - 6
9
5
2
1
Oops!
Okay!
19 - 8
9
10
8
11
Oops!
Okay!
7 + 6
14
13
12
11
Oops!
Okay!
14 - 9
1
5
6
2
Oops!
Okay!
14 - 6
8
7
6
1
Oops!
Okay!
11 + 6
17
13
18
12
Oops!
Okay!
12 - 8
6
4
2
3
Oops!
Okay!
8 + 8
17
14
16
15
Oops!
Okay!
8 + 6
10
14
15
11
Oops!
Okay!
11 - 5
4
5
2
6
Oops!
Okay!
6 + 9
14
16
15
17
Oops!
Okay!
4 + 9
12
14
15
13
Oops!
Okay!
14 - 7
2
4
7
3
Oops!
Okay!
17 - 9
8
9
2
7
Oops!
Okay!
18 - 7
9
6
8
11
Oops!
Okay!
13 - 8
4
2
5
6
Oops!
Okay!
12 - 7
3
2
4
5
Oops!
Okay!
13 - 6
6
7
3
1
Oops!
Okay!
12 - 6
6
8
4
7
Oops!
Okay!
3 + 7
10
12
11
9
Oops!
Okay!
16 - 9
6
7
5
2
Oops!
Okay!
10 - 4
1
2
6
3
Oops!
Okay!
3 + 8
11
8
9
10
Oops!
Okay!
11 - 3
7
4
8
6
Oops!
Okay!
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