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Study
Subtraction - Up to 20
0
%
0
0
0
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19-3=
16
Oops!
Okay!
7-3=
4
Oops!
Okay!
20-10=
10
Oops!
Okay!
12-6=
6
Oops!
Okay!
11-5=
6
Oops!
Okay!
11-6=
5
Oops!
Okay!
15-4=
11
Oops!
Okay!
7-5=
2
Oops!
Okay!
5-2=
3
Oops!
Okay!
10-2=
8
Oops!
Okay!
9-8=
1
Oops!
Okay!
18-5=
13
Oops!
Okay!
20-0=
20
Oops!
Okay!
16-8=
8
Oops!
Okay!
15-5=
10
Oops!
Okay!
9-6=
3
Oops!
Okay!
5-1=
4
Oops!
Okay!
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