Math Word Problems - Unit 1

My sister has some dolls. My mom buys her 6 more. She now has 14 dolls. How many dolls did she have to start with?

My dog found 12 bones on Monday. He then found 16 bones on Tuesday. How many more bones did he find on Tuesday?

Bill has 14 apples. If he gets 5 more he will have the same amount of apples as Tom. How many apples does Tom have?

I have 17 stamps. I use 5 of them to send some letters. How many stamps do I have now?

Our class had 12 balls. Our teacher buys us some more. We now have 17 balls. How many balls did our teacher buy?