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cộng trừ trong phạm vi 10

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  • 4-3=...
    1
  • 5+5=....
    10
  • 3+3=...
    6
  • 4+4=...
    8
  • 4 - 1 =....
    3
  • 3+4=...
    7
  • 5-2=...
    3
  • 6+2=...
    8
  • 6-4=...
    2
  • 6+4=...
    10
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