1 EASY What is 21$$-$$10?

 2 EASY What is 24$$-$$12?

 3 EASY What is 34$$-$$18?

 4 EASY What is 30$$-$$16?

 5 MEDIUM There are 29 students in Mr.Desouza's class. 17 of them are girls. How many boys are in the class? 1112131415

 6 MEDIUM Tony's Pizza Place makes 48 pizzas a day. If 19 of those pizzas are vegetarian, how many are not vegetarian?

 7 MEDIUM Ben has 43 points. Tristan has 99 points. How many more points does Tristan have than Ben?

 8 HARD What is 97$$-$$19?

 9 HARD What is 93$$-$$67?

 10 HARD Carl's Coffee Shop makes 93 coffees every morning. There are 3 sizes: small, medium, and large. If 27 of those are medium and 19 are small, how many are large?