1. Diane bought 6 dolls for $ 6. She had $ 53 in her purse. How many dollars are left in her purse?   2. Michelle has two dolls. The first doll is 27 cm tall and the second is 18 cm. What is the difference in their heights (in cm)?   3. Mark had 87 marbles in his school bag. He returned home with 83 marbles. How many marbles did he lose?   4. Mark arranges 14 blocks in a tall stack. Accidentally, he drops 6 blocks. How many blocks are still there in the stack?   5. Each day 92 cars are made in a toy factory. Of these, 9 are defective. How many toy vehicles are not defective?