Question
Mary and her sister have some pens. Mary had 66 more pens than her sister. After Mary gave her sister 19 pens, her sister has 68 pens now.
  1. How many pens did her sister have at first?
  2. How many pens does Mary have now?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Mary and her sister have some pens. Mary had 66 more pens than her sister. After Mary gave her sister 19 pens, her sister has 68 pens now.
  1. How many pens did her sister have at first?
  2. How many pens does Mary have now?