Răspuns:
a) [tex]\frac{9}{4}[/tex]
b) [tex]\frac{16}{7}[/tex]
c) [tex]\frac{19}{9}[/tex]
d) [tex]\frac{18}{10}[/tex]
e) [tex]\frac{255}{100}[/tex]
f) [tex]\frac{5}{2}[/tex]
g) [tex]\frac{13}{6}[/tex]
h) [tex]\frac{13}{5}[/tex]
Explicație pas cu pas:
Aducem întregul la același numitor cu al fracției, după care efectuăm scăderea.
a) [tex]3 - \frac{3}{4} = \frac{3*4}{4} - \frac{3}{4} = \frac{12}{4} - \frac{3}{4} = \frac{9}{4}[/tex]
b) [tex]3 - \frac{5}{7} = \frac{21}{7} - \frac{5}{7} = \frac{16}{7}[/tex]
c) [tex]3 - \frac{8}{9} = \frac{27}{9} - \frac{8}{9} = \frac{19}{9}[/tex]
d) [tex]3 - \frac{12}{10} = \frac{30}{10} - \frac{12}{10} = \frac{18}{10}[/tex]
e) [tex]3 - \frac{45}{100} = \frac{300}{100} - \frac{45}{100} = \frac{255}{100}[/tex]
f) [tex]3 - \frac{1}{2} = \frac{6}{2} - \frac{1}{2} = \frac{5}{2}[/tex]
g) [tex]3 - \frac{5}{6} = \frac{18}{6} - \frac{5}{6} = \frac{13}{6}[/tex]
h) [tex]3 - \frac{2}{5} = \frac{15}{5} - \frac{2}{5} = \frac{13}{5}[/tex]
