Respuesta :

Answer:

2 1/2 tsp.

Explanation:

1 1/4 tsp is the same as 5/4 tsp. and is just written as an improper fraction. Then you multiply it by 2 since that is what double means. 5/4 * 2 is 10/4, which is the same as 2 2/4, simplified as 2 1/2 tsp.