1. Sarah bought 2 dolls for $ 2. She had $ 69 in her purse. How many dollars are left in her purse?   2. Michelle has two dolls. The first doll is 80 cm tall and the second is 73 cm. What is the difference in their heights (in cm)?   3. Andy had 88 marbles in his school bag. He returned home with 81 marbles. How many marbles did he lose?   4. Andy arranges 12 blocks in a tall stack. Accidentally, he drops 6 blocks. How many blocks are still there in the stack?   5. Each day 34 buses are made in a toy factory. Of these, 4 are defective. How many toy vehicles are not defective?