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Answer 1

Step-by-step explanation:

$1 \frac{1}{15} + 2 \frac{4}{15} = > \frac{16}{15} + \frac{34}{15} = > \frac{50}{15} = > \frac{10}{3}$

$4 \frac{5}{11} + 2 \frac{6}{11} = 4 + 2 + \frac{5 + 6}{11} = 6 + 1 =$

$7$

$1 \frac{2}{12} + 7 \frac{3}{12} = 1 + 7 + \frac{5}{12} = 8 \frac{5}{12}$

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