Question

alyssa want to estimate h should use to do this calc are and bake a cake. choose the action that alyssa baking time (min) preparation time (min) a teacher has a big sheet of stickers to share with her classroom and wants to know how many stickers each child will get if they are shared equally. choose the action that the teacher should use to do this calculation. students (students) total stickers (stickers) make conversion factor stickers per student (stickers/student) selma bought a box of books for her book store a few weeks ago. several of the books have been purchased and she wants to know how many books are left. choose the action that selma should use to do this calculation. books purchased (books) books sold (books) books remaining (books)

Explanation:

Step1: Analyze Alyssa's calculation

To find total time for cake, sum baking + prep time.
Action: add

Step2: Analyze teacher's calculation

To find stickers per student, divide total stickers by number of students, which requires making a conversion factor (ratio of total stickers to students).
Action: make conversion factor

Step3: Analyze Selma's calculation

To find remaining books, subtract sold books from purchased books.
Action: subtract

Answer:

1. Alyssa's action: add
2. Teacher's action: make conversion factor
3. Selma's action: subtract