Odpowiedź:
a)
[tex]3 \frac{3}{4} - (7 - 8 \frac{1}{2} ) - 6 = 3 \frac{3}{4} - ( - \frac{1}{2} ) - 6 = 3 \frac{3}{4} + \frac{2}{4} - 6 = 4 \frac{1}{4} - 6 = - 1 \frac{3}{4} [/tex]
b)
[tex] - 2 \frac{1}{7} - (4 + ( - 6 \frac{3}{4} )) - 8 = - 2 \frac{1}{7} - (4 - 6 \frac{3}{4} ) - 8 = - 2 \frac{1}{7} - ( - 2 \frac{3}{4} ) - 8 = - 2 \frac{4}{28} + 2 \frac{21}{28} - 8 = \frac{17}{28} - 8 = - 7 \frac{11}{28} [/tex]
c)
[tex] - 6 - (8 \frac{1}{4} - 6 + ( - 7)) - 8 = - 6 - (8 \frac{1}{4} - 6 - 7) - 8 = - 6 - (8 \frac{1}{4} - 15) - 8 = - 6 - ( - 6 \frac{3}{4} ) - 8 = - 6 + 6 \frac{3}{4} - 8 = 6 \frac{3}{4} - 14 = - 7 \frac{1}{4} [/tex]
d)
[tex] - 2 + (3 - 6 \frac{1}{4} - ( - 2)) = - 2 + ( - 3 \frac{1}{4} + 2) = - 2 + ( - 1 \frac{1}{4} ) = - 2 - 1 \frac{1}{4} = - 3 \frac{1}{4} [/tex]
