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visibility

71 spiders were behind the bookshelf. Some more spiders spun there. Then, there were 77 spiders. How many spiders spun over to the first 71 spiders?

 

 

 

 

 

  • A

    3

  • B

    2

  • C

    6

  • D

    5

Number sentence/Hint: 

71 + ___ = 77