1. Barbara bought 7 dolls for $ 7. She had $ 92 in her purse. How many dollars are left in her purse?   2. Michelle has two dolls. The first doll is 45 cm tall and the second is 43 cm. What is the difference in their heights (in cm)?   3. Paul had 62 marbles in his school bag. He returned home with 59 marbles. How many marbles did he lose?   4. Paul arranges 12 blocks in a tall stack. Accidentally, he drops 4 blocks. How many blocks are still there in the stack?   5. Each day 73 cabs are made in a toy factory. Of these, 3 are defective. How many toy vehicles are not defective?