Respuesta :

Answer:

21/2

Step-by-step explanation:

10.5 is correct, but that's a decimal

21/2=10.5

Answer:

21/2

Step-by-step explanation:

10*2 = 20

then 20 + 1 = 21

to get your answer which is 21/2

PLEASE RATE!! I hope this helps!!

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