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explain how you can find the sum 25 + 59 without paper, pencil or calculator. Find the sum? How do I do this

  • math -

    You could add 20 and 60 = 80.

    And add 4 more.

    Or -- you could add 25 and 60 and subtract 1.

  • math -

    Do 20+50 which is 70 then 5+9 which is 11 then add 70+11.

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