1,64-9,7 = -0,37 - (-0,84) = 1 3/4 - 2 1/4 = 8/15 - (-1/5) = 1/14 - (-1/7) = 1/6 - (-2/3) = 2/3 - 17/15 =

Решение:

1. \( 1,64 - 9,7 = -8,06 \)
2. \( -0,37 - (-0,84) = -0,37 + 0,84 = 0,47 \)
3. \( 1 \frac{3}{4} - 2 \frac{1}{4} = \frac{7}{4} - \frac{9}{4} = \frac{7-9}{4} = \frac{-2}{4} = -\frac{1}{2} \)
4. \( \frac{8}{15} - (-\frac{1}{5}) = \frac{8}{15} + \frac{1}{5} = \frac{8}{15} + \frac{3}{15} = \frac{8+3}{15} = \frac{11}{15} \)
5. \( \frac{1}{14} - (-\frac{1}{7}) = \frac{1}{14} + \frac{1}{7} = \frac{1}{14} + \frac{2}{14} = \frac{1+2}{14} = \frac{3}{14} \)
6. \( \frac{1}{6} - (-\frac{2}{3}) = \frac{1}{6} + \frac{2}{3} = \frac{1}{6} + \frac{4}{6} = \frac{1+4}{6} = \frac{5}{6} \)
7. \( \frac{2}{3} - \frac{17}{15} = \frac{10}{15} - \frac{17}{15} = \frac{10-17}{15} = \frac{-7}{15} \)

Ответ: -8,06; 0,47; -1/2; 11/15; 3/14; 5/6; -7/15.