Respuesta :

Katelan has 9 friends as guests for a costume party. Katelan is elaborating carnival masks for them. So far , she has made 7 masks. How much more masks is Katelan left to do?

Answer: Katelan has 2 masks left to do . Because 7 (plus) 2 is 9.
You can do subtraction 9-7=2. Riley made 9 cookies hannah ate some they have 7 left how many more does she need to get back to how many she had before