Bailey was building a pond. The pond held 40.5 gallons of water. She had already put 27.9 gallons of water in it. Bailey said sh
e only needed to add 2.6 gallons to fill it. Is this a reasonable estimate? A. Yes, it is reasonable because 27.9 is about 28, and 40.5 is about 41. 41 – 28 = 3 so 2.6 gallons is a reasonable estimate. B. No, it is not reasonable because 27.9 is about 28, and 40.5 is about 41. 41 – 28 = 13, so 13 gallons is a more reasonable estimate. C. No, it is not reasonable because 27.9 is about 30, and 40.5 is about 50. 50 – 30 = 20, so 20 gallons is a more reasonable estimate.
