Question

-1 1/3 : 8/15 : (-5/7) * (-3 1/7)
-3*(-6)-(-30):5
(-1,2)²+(1,2)²+(-1,3)²
решите пж с решением ​

Answer 1

Ответ:

$- \frac{11}{3} \div \frac{8}{15} \div ( - \frac{5}{7}) \times (3 \frac{1}{7} ) \\ - \frac{11}{3} \div \frac{8}{15} = - \frac{11}{3} \times \frac{15}{8} = - \frac{55}{8} \\ - \frac{55}{8} \div ( - \frac{5}{7} ) = - \frac{55}{8} \times ( - \frac{7}{5} ) = \frac{77}{8} \\ \frac{77}{8} \times ( - \frac{22}{7} ) = - \frac{121}{4} = - 30 \frac{1}{4} \\ 18 - ( - 6) = 24 \\ 1.44 + 1.44 + 1.69 = 4.57$