[tex] - 3 \frac{1}{4} + ( - 1 \frac{1}{2} ) + ( - 3 \frac{1}{5} + ( - 2 \frac{1}{10} )) [/tex]

[tex]1) - 3 \frac{1}{4} + ( - 1 \frac{1}{2} ) = - 3 \frac{1}{4} - 1 \frac{1}{2} = - 3 \frac{1}{4} - 1 \frac{2}{4 } = - 2 \frac{5}{4} - 1 \frac{2}{4} = - 3 \frac{7}{4} = - 4 \frac{3}{4} [/tex]

[tex]2) - 3 \frac{1}{5} + ( - 2 \frac{1}{10} ) = - 3 \frac{1}{5} - 2 \frac{1}{10} = - 3 \frac{2}{10} - 2 \frac{1}{10} = - 5 \frac{3}{10} [/tex]

[tex]3) - 4 \frac{3}{4} + ( - 5 \frac{3}{10} ) = - 4 \frac{3}{4} - 5 \frac{3}{10} = - 4 \frac{30}{40} - 5 \frac{12}{40} = - 9 \frac{42}{40} = - 10 \frac{2}{40} = - 10 \frac{1}{20} [/tex]

Відповідь:

[tex]10 \frac{1}{20} [/tex]