Kidzone.ws Word Problem

Mrs. Smith's grade two class is on a field trip to the beach.  During some free time before and after lunch the students were allowed to look for seashells.  Before lunch the class found 20 seashells.  After lunch they looked some more and found 60 seashells. 

Write the math equation: ______________________

How many sea shells did Mrs. Smith's class find? _______

 
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