Third Grade Challenging Math

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3-31)  Answer

    A) 300
    B) 405

A) 12 + 82 + 65 + 18 + 35 + 88

  = 12 + 88 + 82 + 18 + 65 + 35 = 100 + 100 + 100 = 300

B)  41 + 42 + 43 + 44 + 45 + 46 + 47 + 48 + 49

  = 41 + 49 + 42 + 48 + 43 + 47 + 44 + 46 + 45

  = 90 + 90 + 90 + 90 + 45 = 405