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Number pairs of 10 and 20

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    Please find the number pair of 10 and 20
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  • Number pair 10 of 2 is
    8
  •  15
  • Number pair 10 of 9 is.....
    1
  •  15
  • Number pair 20 of 15 is.....
    5
  •  15
  • Number pair 20 of 3 is.....
    17
  •  15