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Cassy has 9 books on her bookshelf and 3 books on her desk. She wants to know how many books she has in all. What operation should she use? Explain.
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2 votes
Cassy has 9 books on her bookshelf and 3 books on her desk. She wants to know how many books she has in all. What operation should she use? Explain.

User Viktor Klang
by
8.2k points

1 Answer

2 votes

Answer:

a=12

Explanation:

i got it right on the test.

User Alireza Yazdandoost
by
8.8k points
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