1. Cheryl bought 8 dolls for $ 8. She had $ 19 in her purse. How many dollars are left in her purse?   2. Michelle has two dolls. The first doll is 83 cm tall and the second is 78 cm. What is the difference in their heights (in cm)?   3. Adam had 11 marbles in his school bag. He returned home with 8 marbles. How many marbles did he lose?   4. Adam arranges 15 blocks in a tall stack. Accidentally, he drops 8 blocks. How many blocks are still there in the stack?   5. Each day 53 cabs are made in a toy factory. Of these, 8 are defective. How many toy vehicles are not defective?