Question

вычислите вычитание: 1/2-(+4); -5/11-(-5/11); -5-(-2/1/3); -8-(-1/7); 1/6-(+3); -5/12-(-4).

Answer 1

$\frac{1}{2} - ( + 4 )= \frac{1}{2} - \frac{8}{2} = - \frac{7}{2} = - 3.5 \\ \frac{ - 5}{11} - ( - \frac{5}{11} ) = - \frac{ 5}{11} + \frac{5}{11} = 0 \\ - 5 - ( \frac{ - 2}{ \frac{1}{3} } ) = - 5 -( - 6) = - 5 + 6 = 1 \\ - 8 - ( - \frac{1}{7} ) = - 8 + \frac{1}{7} = \frac{ - 56 + 1}{7} = - \frac{55}{7} = - 7 \frac{6}{7} \\ \frac{1}{6} - ( + 3) = \frac{1 - 18}{6} = - \frac{17}{6} = - 2 \frac{5}{6} \\ - \frac{5}{12 } - ( - 4) = \frac{ - 5 + 48}{12} = \frac{43}{12} = 3 \frac{7}{12}$