Question

помогите пожалуйста​

Answer 1

N1.
$- 6.47 + 8.32 + 6.47 + ( - 7.32) = 1 \\ 1) - 6.47 + 8.32 = 1.85 \\ 2)1.85 + 6.47 = 8.32 \\ 3)8.32 + ( - 7.32) = 8.32 - 7.32 = 1$
N2.
$- \frac{19}{42} + ( - \frac{9}{16} ) + ( - \frac{11}{42} ) + \frac{5}{16} = - \frac{27}{28} \\ 1) - \frac{19}{42} - \frac{9}{16} = - \frac{152}{336} - \frac{189}{336} = - \frac{341}{336} = - 1 \frac{5}{336} \\ 2) - 1 \frac{5}{336} + ( - \frac{11}{42} ) = - 1 \frac{5}{336} - \frac{88}{336} = - 1 \frac{93}{336} \\ 3) - 1 \frac{93}{336} + \frac{5}{16} = - 1 \frac{93}{336} + \frac{105}{336} = - \frac{324}{336} = - \frac{27}{28}$