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Study
Review 1-30
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0-0-0-0-0-0-0+20
20
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10+20-20+10
20
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Okay!
2+2-2+2-2
2
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Okay!
23-9
14
Oops!
Okay!
9+9-8+16
26
Oops!
Okay!
12+12
24
Oops!
Okay!
9-8+9
10
Oops!
Okay!
1+1+1+2+2+2+3+3+3+4
22
Oops!
Okay!
11+11-1
21
Oops!
Okay!
15+15-9+0-1-20
0
Oops!
Okay!
1+2+3+4+5+6+7
28
Oops!
Okay!
12+18-30+9
9
Oops!
Okay!
10-10+10-10+10
10
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Okay!
18+12-14
16
Oops!
Okay!
7+5+9-8-8
5
Oops!
Okay!
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