Помогите ну пожалуйста 507 508

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507.
$1) \: \: 12 \times 2 \frac{1}{6} = \frac{12 \times 13}{6} = 2 \times 13 = 26 \\ 2) \: \: 14 \times 2 \frac{11}{14} = \frac{14 \times 39}{14} = 39 \\ 3) \: \: 5 \times 2 \frac{1}{25} = 10 + \frac{5}{25} = 10 \frac{1}{5} = 10.2$
$4) \: \: 24 \times 5 \frac{5}{12} = \frac{24 \times 65}{12} = 2 \times 65 = 130 \\ 5) \: \: 11 \times 1 \frac{1}{22} = \frac{11 \times 23}{22} = \frac{23}{2} = 11 \frac{1}{2} = 11.5 \\ 6) \: \: 15 \times 1 \frac{1}{30} = 15 + \frac{15}{30} = 15 \frac{1}{2} = 15.5$

▪508

$1) \: \: x \div \frac{9}{10} = 1 \\ x = 1 \times \frac{9}{10} \\ x = \frac{9}{10} = 0.9 \\$

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$2) \: \: x \div 19 = \frac{16}{19 } \\ x = \frac{16 \times 19}{19} \\ x = 16$

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$3) \: \: x \div 3 = \frac{5}{9} \\ x = \frac{5 \times 3}{9} \\ x = \frac{5}{3} = 1 \frac{2}{3}$