Unit 7 Contents

Check-In: Questions 7–8

7. Art's Dime Store has four large tanks of goldfish. Here are Art's records for the goldfish last week:

Goldfish Inventory


Number of goldfish at beginning of week	588
Number of new goldfish from the supplier	603
Number of goldfish sold to customers	462
Number of goldfish that died	81

1. At the end of the week, did Art have more or fewer goldfish than he had at the beginning of the week? Show or tell how you found your answer. Explain why you chose to estimate or find an exact answer.
2. How many more or how many fewer goldfish did Art have at the end of the week? Show or tell how you solved the problem about Art's goldfish. Explain why you chose to either estimate or find exact answers.
3. How many total goldfish did Art have at the end of the week?
8. Each of the tanks in Art's store will hold about 150 small fish. Art thinks he may need to buy another tank to hold all of the fish that he has. Use your answer to Question 7C to help Art decide if he should buy another tank. Show or tell how you decided.