Question

1024 помогите пжжжж оч срочно​

Answer 1

$- 3.2 \times 0.4 + 2.6 \times ( - 0.5) = \\ - 1.28 - 1.3 = - 2.58$

$5.2 \times ( - 0.8) - ( - 1.5) \times ( - 3.4) = \\ - 4.16 - 5.1 = - 9.26$

$(7.6 - 20) \times ( - 3.14 + 5.24) = \\ - 12.4 \times 2.1 = - 26.04$

$( - 1 \frac{3}{25} ) \times 2 \frac{1}{7} + ( - 2 \frac{1}{9} ) \times ( - \frac{27}{190} ) = \\ - \frac{28 \times 15}{25 \times 7} + \frac{19 \times 27}{9 \times 190} = - \frac{4 \times 3}{5} + \frac{3}{10} = \\ - \frac{12}{5} + \frac{3}{10} = - 2.4 + 0.3 = - 2.1$

$(8 + 2 \frac{1}{7} \times ( - 3 \frac{1}{9} )) \times ( - \frac{27}{44} ) = - \frac{9}{11} \\ 1) \: \: 2 \frac{1}{7} \times ( - 3 \frac{1}{9} ) = - \frac{15 \times 28}{7 \times 9} = \\ - \frac{5 \times 4}{3} = - \frac{20}{3} = - 6 \frac{2}{3} \\ 2) \: \: 8 - 6 \frac{2}{3} = 7 \frac{3}{3} - 6 \frac{2}{3} = 1 \frac{1}{3} \\ 3) \: \: 1 \frac{1}{3} \times ( - \frac{27}{44} ) = - \frac{4 \times 27}{3 \times 44} = - \frac{9}{11}$

$( - 5 \frac{1}{16} + 1 \frac{1}{8} ) \times ( - \frac{5}{6} - \frac{3}{14} ) = \\ ( - 5 \frac{1}{16} + 1 \frac{2}{16} ) \times ( - \frac{35}{42} - \frac{9}{42} ) = \\ ( - 4 \frac{17}{16} + 1 \frac{2}{16} ) \times ( - \frac{44}{42} ) = \\ - 3 \frac{15}{16} \times ( - \frac{22}{21} ) = \frac{63 \times 22}{16 \times 21 } = \\ \frac{3 \times 11}{8} = \frac{33}{8} = 4 \frac{1}{8} = 4.125$