21.2,5=52,5 52+7,5=60 60:16=3,75 3,75.2=7,5 7,5 al cuadrado=15
15.2=30 30:3=10 10:2=5
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21.2,5=52,5 52+7,5=60 60:16=3,75 3,75.2=7,5 7,5 al cuadrado=15
15.2=30 30:3=10 10:2=5