Read the following examples. Tell if each is an example of spending or saving. Then solve the problem and use a number sentence. Be ready to share your solution and thinking. You may need a pencil and paper.
a) Kathryn has decided to put her $5 dog walking earnings away so that someday she will have enough money for her own puppy. She had already $20. How much money does she have now?
b) Tom asked his dad to take him to the bike shop. He decided he needs a bike if he is going to start delivering newspapers in his neighborhood. He has $100 and the bike cost him $80. How much money does he have now?
c) Emily opened her piggy bank to see how much money is in the bank. After adding her $5 babysitting money, she had a total of nine dollars. How much was in her piggy bank to start with?