Răspuns:
Explicație pas cu pas:
Aceasta rezolvare este prin metoda
CU INTREGI
9)A. [tex]2\frac{2}{9} -\frac{19}{15} =\frac{20}{9}- \frac{19}{15}=\frac{100}{45}-\frac{57}{45}=\frac{43}{45} [/tex]
B. [tex]2\frac{5}{8}-\frac{47}{20}=\frac{21}{8}-\frac{47}{20}=\frac{105}{40}-\frac{94}{40}=\frac{11}{40} [/tex]
C. [tex]3\frac{5}{6}-\frac{51}{16} =\frac{22}{6}-\frac{51}{16}=\frac{352}{96}-\frac{306}{96}=\frac{342}{96} [/tex]
10)A. [tex]3\frac{3}{4}-\frac{1}{12}-\frac{7}{6}=\frac{15}{4}-\frac{1}{12}-\frac{7}{6}=\frac{45}{12}-\frac{1}{12}-\frac{14}{12}= \frac{30}{12} [/tex]
B. [tex]2\frac{9}{20}-\frac{4}{5}-\frac{1}{4}=\frac{49}{20}-\frac{4}{5}-\frac{1}{4}=\frac{49}{20}-\frac{16}{20}-\frac{5}{20}=\frac{44}{20} [/tex]
C. [tex]2\frac{7}{30}-\frac{5}{6}-\frac{1}{5}=\frac{60}{30}-\frac{5}{6}-\frac{1}{5}=\frac{60}{30}-\frac{25}{30}-\frac{6}{30}=\frac{29}{30}[/tex]
