A student buys L of water; if gal L, how many gal is it?
- 5 gal (correct answer)
- 7.2 gal
- 72.2 gal
- 15.2 gal
Explanation: This question tests SSAT Middle Level skills in converting between units within a measurement system. Understanding unit conversions involves using conversion factors to translate a measurement from one unit to another, which is essential for practical applications like cooking or travel. In this specific scenario, the problem involves converting 19 L to gallons using the conversion factor 1 gal = 3.8 L. Choice A is correct because it accurately applies the conversion factor by dividing 19 by 3.8 to find 5 gallons, demonstrating comprehension of the conversion process. Choice C is incorrect because it represents a common error such as multiplying instead of dividing, which occurs when students confuse the operation direction. To assist students, teach them to always confirm they have the correct conversion factor and understand the direction of the conversion. Encourage practicing with varied types of units to build flexibility and avoid reliance on memorized conversions.