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G2A Lesson 6 Number Pairs (20/30)

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  • 20 - ??? = 12
    8
  • 760 - 230 = ???
    530
  • ??? + 14 = 20
    6
  • 19 + 11 = ???
    30
  • 1015 - 715 = ???
    300
  • 20 + ??? = 30
    10
  • 30 - ??? = 21
    9
  • 30 - 15 = ???
    15
  • ??? + 28 = 30
    2
  • 12 + ??? = 30
    18
  • 330 - 115 = ???
    215
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