4. Упростите выражение: 1) \frac{19}{22}m - \frac{7}{22} m;

1) $$\frac{19}{22}$$m - $$\frac{7}{22}$$ m = m($$\frac{19}{22}$$ - $$\frac{7}{22}$$) = m$$\cdot$$\frac{19-7}{22}$$ = m$$\cdot$$\frac{12}{22}$$ = m$$\cdot$$\frac{6}{11}$$ = $$\frac{6}{11}$$m

Ответ: $$\frac{6}{11}$$m