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Addition to 20 Missing Addend

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  • 4+_=14
    10
  • _+6=10
    4
  • 7+_=9
    2
  • _+11=15
    4
  • 5+_=8
    3
  • 13+_=16
    3
  • 15+_=17
    2
  • _+3=11
    8
  • _+4=18
    14
  • _+7=8
    1
  • 17+_=20
    3
  • _+3=12
    9
  • 9+_=17
    8
  • 7+_=14
    7
  • 5+_=19
    14
  • _+5=9
    4
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