please answer my questions
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(1) (1.2)² = (12/10)² = 144/100 = 1.44.
(2) (0.7)² = (7/10)² = 49/100 = 0.49.
(3) (0.3)² = (3/10)² = 9/100 = 0.09.
(4) (0.05)² = (5/100)² = 25/10000 = 0.0025.
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