story problems addition and subtraction

Which math operation should you use:

Laura has 27 books. Paul has 16 books. How many books do they have in sum?

• addition

• subtraction

Which math operation should you use:

When the bus left the school there were 25 students on it. At the first stop, 3 students got off the bus. At the second stop, 11 students got off. How many students remain on the bus?

• addition

• subtraction

What math operation should you do?

Roberto had 25 toy cars, but he lost 7. How many toy cars are left?

• addition

• subtraction

What math operation should you do:

Maria has 3 toys. Liam has 5 toys. How many toys do they have in all?

• addition

• subtraction

Ava has 15 cookies and Hannah ate 3 cookies.  How many cookies are left?

• 10 cookies
• 12
• 12 cookies
• 5

Mr. Cooper reads 5 books a day. How many books does he read in 3 days?

• 5 books
• 10 books
• 15 books
• 20 books