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การบวกลบจำนวนเต็ ...
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7 - (-9)
-16
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Okay!
(-7) + 9
2
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Okay!
(-4) - 11
-15
Oops!
Okay!
9 - (-6)
15
Oops!
Okay!
5 - 7
-2
Oops!
Okay!
(-15) + (-3)
-18
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Okay!
12 + (-5)
7
Oops!
Okay!
(-6) + (-5)
-11
Oops!
Okay!
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