question: Mazie has 52 marbles and gives them to twins, Dallas and Darla.  If Dallas has a total of 21 marbles after dropping 4 of them in the playground, how many did Mazie give to Darla?
answer: Mazie gave Dallas 21 + 4 = <<21+4=25>>25 marbles.
  Darla has 52 - 25 = <<52-25=27>>27 marbles.
  #### 27