Bobby wanted pancakes for breakfast. The recipe on the box makes 21 pancakes. While he ate 5 pancakes, his dog jumped up and was able to eat 7 before being caught. How many pancakes does Bobby have left? Think carefully first, then make a decision:
Bobby ate 5 pancakes and his dog ate 7 so 5 + 7 = 12. The recipe makes 21 pancakes and 12 were eaten so 21 - 12 = 9 pancakes were left. So, the answer is 9.