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64 : 16/9 - 9: 4/10 = 36 - 22,5 = 13.5
a)8²:(1⅓)²-9:(⅗)²
64 : (4/3)² - 9: (9/25)=
= 64 : (16/9) - 9*(25/9)=
= 64 *(9/16) - 25 =
= 36 - 25 =
= 11