Question

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Помогите пж срочно! 30б

Answer 1

$1)5\frac{1}{7}*5\frac{1}{4}=\frac{36}{7}*\frac{21}{4}=\frac{4*9*7*3}{7*4}=9*3=27\\\\2)5\frac{5}{8}*3\frac{1}{5} =\frac{45}{8}*\frac{16}{5}=\frac{5*9*2*8}{8*5}=9*2=18\\\\3)27+18=45\\\\4)10\frac{5}{13}:1\frac{1}{26}=\frac{135}{13}:\frac{27}{26}=\frac{135}{13}*\frac{26}{27}=\frac{27*5*13*2}{13*27}=5*2=10\\\\5)45:10=4,5\\\\Otvet:\boxed{4,5}$