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math grade 1

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  • 4 + 0
    4
  • 50 + 20
    70
  • 20+ 20 = ................
    40
  • 30 - 20
    10
  • you lucky
    lucky
  • 6 + 6
    12
  • 100 + 300
    400
  • 8 + 9
    17
  • 20 - 1
    19
  • 7 + 9
    16
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