Question

Which problem represents the join, result unknown structure?
a) Maryann had 3 library books before she checked out 2 more. How many did she have all together?
b) Maryann had 5 library books before she returned 2 of them. How many does she have now?
c) Maryann had 4 nonfiction books and 2 fiction. How many more nonfiction books does she have?
d) Maryann had 9 library books and Jim had 4. How many more did Maryann have than Jim?

Answer

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