Question

вычитание дробей.
7/42 - 6/21
2/3 - 2/8 ​

Answer 1

$\frac{7}{42} -\frac{6}{21} =\frac{7}{42} -\frac{12}{42} =-\frac{5}{42}$

$\frac{2}{3} -\frac{2}{8}=\frac{12}{16}-\frac{4}{16}=\frac{8}{16}=\frac{1}{2}$

Ответ: $-\frac{5}{42}$ и $\frac{1}{2}$

Answer 2

7.\1 6. \2. 7. 12. 5
---- - --- =. ---- -- ----- =. -----
42. 21. 42. 42. 42