
1. 
EASY

There are 24 cheesestrings in the Smiths' fridge. Alda Smith takes 2 for lunch; Jaime Smith takes 1 for lunch; Justin Smith takes 5 for lunch; and Jacoby Smith takes 1 for lunch. How many cheesestrings are left in the Smiths' fridge?

2. 
MEDIUM

There was a box of 305 hair elastics. Emily bought 231 more elastics and added them to the box. However, Emily's sister Anna decided to take 101 elastics from the box. How many hair elastics are left in the box now?

3. 
MEDIUM

A subway car is travelling its usual route. There are zero people on the car as the train leaves the station. At station 1, 31 people get on the car. At station 2, 21 people get on the car and 5 get off. At station 3, 45 people get on the car and 10 get off. At station 4, 56 people get on the car and 12 get off. At station 5, 13 people get on the car and 65 get off. As the train leaves station 5, how many people are in this car?

4. 
HARD

In September 2011, there were 2308 students enrolled in a very large high school. In 2012, 561 students graduated and left the school and 512 students entered the school in September. In 2013, 602 students graduated and left the school and 588 students entered the school in September. How many students were there at this school in September 2013?

5. 
HARD

A shoe store starts off a day with a certain number of pairs of shoes. During the morning, 15 pairs are sold. During the afternoon, 16 pairs are sold and 5 are returned by unhappy customers. During the evening, 20 pairs are sold and 7 are returned. At the end of the day, the shoe store has 100 pairs of shoes left. How many shoes did the store start off with at the beginning of the day?

