Duckboii Duckboii

19-02-2021
Mathematics

contestada

There are 15 books on a shelf. 9 of these books are new. The rest of them are used.

Respuesta :

1041090 1041090

19-02-2021

Answer: 7

Step-by-step explanation:

15-9 =

9 10 11 12 13 14 15

1 2 3 4 5 6 7

7 books were used.

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