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49 frogs were on the field. Some more frogs hopped there. Then, there were 57 frogs. How many frogs hopped over to the first 49 frogs?

 

 

 

 

 

  • A

    3

  • B

    8

  • C

    4

  • D

    5

Number sentence/Hint: 

49 + ___ = 57