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P.1 加法
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8+7+3=_____
18
Oops!
Okay!
4+3+6=___
13
Oops!
Okay!
2+3+4=_____
9
Oops!
Okay!
3+7=_____
10
Oops!
Okay!
5+12=______
17
Oops!
Okay!
9+6+1=____
16
Oops!
Okay!
8+9=______
17
Oops!
Okay!
5+2+8=___
15
Oops!
Okay!
4+8+7=____
19
Oops!
Okay!
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