Question

(1 2/7 * 7/18 - 2/5 : 1 1/5) + 2 2/5 : 2 2/15
срочно помогите

Answer 1

$1)1 \frac{2}{7} \times \frac{7}{18} = \frac{9}{7} \times \frac{7}{18} = \frac{9^1 \times7^1 }{7^1 \times 18^2} = \frac{1}{2}$

$2) \frac{2}{5} \div 1 \frac{1}{5} = \frac{2}{5} \div \frac{6}{5} = \frac{2^1 \times 5^1}{5^1 \times 6^3} = \frac{1}{3}$

$3) \frac{1}{2} ^3 - \frac{1}{3} ^2 = \frac{3 - 2}{6} = \frac{1}{6}$

$4)2 \frac{2}{5} \div 2 \frac{2}{15} = \frac{12}{5} \div \frac{32}{15} = \frac{12^3 \times 15^3}{5^1 \times 32^8} = \frac{9}{8} = 1 \frac{1}{8}$

$5) \frac{1}{6} + 1 \frac{1}{8} = \frac{1}{6}^4 + \frac{9}{8}^3 = \frac{4 + 27}{24} = \frac{31}{24} = 1 \frac{7}{24}$