3 3/4 + 2 4/5 - 1 3/4

3 3/4+2 4/5-1 3/4=3,75+2,8-1,75=6,55-1,75=4,8=4 8/10=4 4/5

[tex]3 \frac{3}{4} + 2 \frac{4}{5} - 1 \frac{3}{4} =\frac{15}{4} + \frac{14}{5} - \frac{7}{4} = \frac{75+56-35}{20} = \frac{96}{20}= \frac{24}{5} [/tex] [tex]= 4 \frac{4}{5} [/tex]

Semoga bisa membantu :)