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Adding and subtracting
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%
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20+5= ?
25
Oops!
Okay!
2+2= ?
4
Oops!
Okay!
6+4= ?
10
Oops!
Okay!
18-5= ?
13
Oops!
Okay!
2-0= ?
2
Oops!
Okay!
9+10= ?
19
Oops!
Okay!
11-2= ?
9
Oops!
Okay!
5+4= ?
9
Oops!
Okay!
7-1= ?
6
Oops!
Okay!
100-100= ?
0
Oops!
Okay!
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