Question

найдите значение выражения 1)(-1,56-1,42)×(-1целая5/14). 2)(4 целых 5/9-3 целых 7/12):(-1 целая8/27

Answer 1

$( - 1.56 - 1.42) \times ( - 1 \frac{5}{14} ) = \\ = - 2.98 \times ( - 1 \frac{5}{14} ) = \frac{2831}{700} = \\ = 4 \frac{31}{700}$
$(4 \frac{5}{9} - 3 \frac{7}{12} ) \div ( - 1 \frac{8}{27} ) = \\ = (4 \frac{20}{36} - 3 \frac{21}{36} ) \times ( - \frac{27}{35} ) = \\ = (\frac{164}{36} - \frac{129}{36} ) \times ( - \frac{27}{35} ) = \\ = \frac{35}{36} \times ( - \frac{27}{35} ) = - \frac{27}{36} = - \frac{3}{4} = \\ = - 0.75$