1. Barbara bought 5 dolls. Each doll cost $ 5. How many dollars did she spend on the dolls?   2. Diane has 4 dolls. Each doll has a red dress, a blue dress, and a white dress. How many dresses are there in all?   3. Paul has 5 toy cars. How many total wheels are there on the toy cars?   4. Paul arranges 11 blocks in a tall stack. He makes 3 such stacks. How many total blocks are there in the stacks?   5. Stacy multiplied 7 by 7 on her toy calculator. What product did the calculator display?