1. Barbara bought 11 dolls. Each doll cost $ 4. How many dollars did she spend on the dolls?   2. Cheryl has 4 dolls. Each doll has a blue dress, a red dress, and a green dress. How many dresses are there in all?   3. Robert has 3 toy cars. How many total wheels are there on the toy cars?   4. Robert arranges 10 blocks in a tall stack. He makes 7 such stacks. How many total blocks are there in the stacks?   5. Michelle multiplied 9 by 8 on her toy calculator. What product did the calculator display?