1. Debbie bought 4 dolls for $ 4. She had $ 44 in her purse. How many dollars are left in her purse?   2. Cheryl has two dolls. The first doll is 84 cm tall and the second is 76 cm. What is the difference in their heights (in cm)?   3. Darren had 79 marbles in his school bag. He returned home with 75 marbles. How many marbles did he lose?   4. Darren arranges 17 blocks in a tall stack. Accidentally, he drops 8 blocks. How many blocks are still there in the stack?   5. Each day 68 cabs are made in a toy factory. Of these, 3 are defective. How many toy vehicles are not defective?