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  • 20 + _______ = 50
    30
  • 25 + 30
    55
  • 19 + 1 = 20 true or false
    true
  • 200 + 500 = 800 true or false
    false
  • 55 + 20
    75
  • 999 -999 = 999 true or false
    false
  • 47 + 3 +10 +20 = 80 true or false
    true
  • 299 -299
    0
  • 9 - 9
    0
  • 200 ___ 200 = 400 ( choose - or +)
    +
  • 4 + ____ = 34
    30
  • 15 + 9
    24
  • 30 + 30 - 30 -30 = 99 true or false
    false
  • 20 - 8
    12
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