Math/3rd grade

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When Joe calls Hank on the phone the call usually last 4 minutes. Last night they talked on the phone for 10 minutes more than twice the time they usually spend on the phone. Last nights phone call lasted _______ minutes.
Pls. explain. thanks.

  • Math/3rd grade -

    try one step at a time... ten minutes MORE than...twice what they usually spend... So take what they usually spend and make it twice that. If they usually spend four minutes then twice that is eight min. then say ten minutes more than that... ten more than eight minutes... eighteen minutes

  • Math/3rd grade -

    They would have talked for 18 minutes twice of the usual time which would be 8 plus 10 because 10 minutes more so it would equal 18......

    4+4=8+10=18

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