[tex] \frac{2}{3} + \frac{1}{8} = \frac{16 + 3}{24} = \frac{19}{24} [/tex]

[tex] \frac{7}{12} - 0.375 = \frac{7}{12} - \frac{375}{1000} = \frac{7}{12} - \frac{3}{8} = \frac{14 - 9}{24} = \frac{5}{24} [/tex]

[tex]1 - ( \frac{5}{6} - \frac{1}{4} ) = 1 - \frac{10 - 3}{12} = 1 - \frac{7}{12} = \frac{5}{12} [/tex]

[tex]1- (0.5 + \frac{5}{12} ) = 1 - ( \frac{1}{2} + \frac{5}{12} ) = 1 - \frac{11}{12} = \frac{1}{12} [/tex]

Відповідь:

1 - Г

2 - А

3 - Б

4 - Д