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การบวกจำนวนเต็ม

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  • (-9) + (-10) = ?
    -19
  • (-7) + (-8) = ?
    -15
  • 31 + 27 = ?
    58
  • 2 + 8 = ?
    10
  • (-2) + (-18) = ?
    -20
  • 4 + 36 = ?
    40
  • (-4) + (-9) = ?
    -13
  • 14 + 16 = ?
    30
  • (-4) + (-25) = ?
    -29
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