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The bell rings for school at 8:30 a.m. Elia must be there 15 minute before the bell. The trip to school takes 35 min. When should Elisa leave for school.

  • math -

    You could simply count on your fingers -- or you can subtract from the equivalent of 8:30.

    7:90 - 50 = ?

  • math -

    8:30-15=8:15
    8:15-35=7:40

    7:40

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