1. Michelle bought 8 dolls. Each doll cost $ 3 .How many dollars did she spend on the dolls?   2. A board game has 16 total coins. There are equal number of coins of 2 different colors. How many coins are there of each color?   3. Jackhas 8 toy cars. How many total wheels are there on the toy cars?   4. Ronnie arranges 21 blocks in two stacks. He then arranges 25 blocks in five stacks. How many blocks did he arrange in the seven stacks?   5. Last Friday 52 buses were made in a toy factory. Of these, 9 were defective. How many toy vehicles were not defective?