Пошаговое объяснение:

1) 14,9 - 15,1 = -(15,1 - 14,9) = -0,2

2) 32,5 - (-7) = 32,5 + 7 = 39,5

3) -12,3 - 13,2 = -(12,3 + 13,2) = -25,5

4) -12,9 - (-8,9) = -12,9 + 8,9 = -(12,9 - 8,9) = -4

5) 7/8 - 1 = 7/8 - 8/8 = -(8/8 - 7/8) = -1/8

6) -2/3 - 3 = -(2/3 + 3) = -3 2/3

7) -4 1/3 - (-5 1/3) = -4 1/3 + 5 1/3 = 5 1/3 - 4 1/3 = 1

8) 2 5/9 - (-1 4/9) = 2 5/9 + 1 4/9 = 3 9/9 = 4

[tex]1) \: 14.9 - 15.1 = - 0.2 \\ 2) \:32.5 - ( - 7) = 32.5 + 7 = 39.5 \\ 3) \: - 12.3 - 13.2 = - 25.5 \\ 4) \: - 12.9 - ( - 8.9) = - 12.9 + 8.9 = - 4 \\ 5) \: \frac{7}{8} - 1 = \frac{7}{8} - \frac{8}{8} = - \frac{1}{8} \\ 6) \: - \frac{2}{9} - 3 = - 3 \frac{2}{9} \\ 7) \: - 4 \frac{1}{3} - ( - 5 \frac{1}{3} ) = - 4 \frac{1}{3} + 5 \frac{1}{3} = 1 \\ 8) \: 2 \frac{5}{9} - ( - 1 \frac{4}{9} ) = 2 \frac{5}{9} + 1 \frac{4}{9} = 3 \frac{9}{9} = 4[/tex]