Question

Помогите пожалуйста мне срочно надо!!​

Answer 1

$0.4 \times \frac{2}{7} + 2.3 \times \frac{3}{7} = \frac{4}{10} \times \frac{2}{7} + 2 \frac{3}{10} \times \frac{3}{7} = \frac{4}{10} \times \frac{2}{7} + \frac{23}{10} \times \frac{3}{7} = \frac{8}{70} + \frac{69}{70} = \frac{77}{70} = \frac{11}{10} = 1 \frac{1}{10} = 1.1$

$( - \frac{2}{17} ) \times (1 - 17.6 \div 55) = ( - \frac{2}{17} ) \times(1 - 17 \frac{6}{10} \div 55) = ( - \frac{2}{17} ) \times(1 - \frac{176}{10} \times \frac{1}{55} ) = ( - \frac{2}{17} ) \times (1 - \frac{176}{550} ) = ( - \frac{2}{17} ) \times(1 - \frac{8}{25} )= ( - \frac{2}{17} ) \times( \frac{25 - 8}{25} ) = ( - \frac{2}{17} ) \times \frac{17}{25} = - \frac{2}{25}$