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Adding Three One-Digit Numbers

Adding Three One-Digit Numbers

Adding three numbers (for example 5 + 8 + 7) involves two steps.

  • Mentally add the first two numbers. (5 + 8 = 13).
  • Add the other number to this sum. (13 + 7 = 20).

Find the Sum of the three Numbers.

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2006-10-02 20:10:15
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