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