Find √1.5625.

Problem restatementCompute the principal square root of 1.5625.

Concept/ApproachNote that 1.25² = (5/4)² = 25/16 = 1.5625.

Step-by-step calculation√1.5625 = √(25/16) = 5/4 = 1.25

Common pitfallsIncorrect decimal squaring; using 1.24 or 1.26 by rough rounding.

Final Answer1.25