addition and subtraction

  Plus (one plus one equals two) Add (add one to one and there are two in all)   Minus (four minus one equals three) Take away (take away one from four and there are three in all)  There were seven apples on the table but Chris ate three How many apples are left?  Greg has twenty two cats at home He found six more cats on the street today How many cats will he have if he takes the five cats to his home?  Meg had fifteen pairs of shoes at home before Yesterday, her dog was biting four of them How many pairs of shoes does she have now?  Kate had 33RMB this morning Peter gave her 49RMB at noon How much money does she have to eat lunch?  Nancy used to have twelve pencils but her classmate stole two of them How many pencils does she have left?  There were twenty eight students in the classroom before Four new students joined the class today How many students does the class have in all?  Jake and Lucy need to buy a book The book costs thirty dollars If Lucy has thirteen dollars, then how much money does Jake need to buy the book? ... (one plus one equals two) Add (add one to one and there are two in all)   Minus (four minus one equals three) Take away (take away one from four and there are three in all)  There were seven... before Four new students joined the class today How many students does the class have in all?  Jake and Lucy need to buy a book The book costs thirty dollars If Lucy has thirteen dollars, then how