Mathematics, 10.12.2020 17:30, 22chandlerlashley

If one dinosaur is in the room then 2 more enter, then 3 leave then 9 enter, then 2 leave how many dinos are in the room?

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If one dinosaur is in the room then 2 more enter, then 3 leave then 9 enter, then 2 leave how many d...