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Adding Tens
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50+9
59
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Okay!
2+30
32
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Okay!
8+20
28
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Okay!
2+80
82
Oops!
Okay!
80+2
82
Oops!
Okay!
70+4
74
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Okay!
20+5
25
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Okay!
60+1
61
Oops!
Okay!
9+40
49
Oops!
Okay!
7+20
27
Oops!
Okay!
3+50
53
Oops!
Okay!
70+4
74
Oops!
Okay!
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