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Ответ:

[tex]1)7\frac{9}{10}+3\frac{2}{15} = 7\frac{27}{30}+3\frac{4}{30} =10\frac{31}{30} =11\frac{1}{30} \\ \\ 2)4\frac{7}{15}+1 \frac{5}{6}= 4\frac{14}{30}+1 \frac{25}{30}=5\frac{39}{30}=6\frac{9}{30} =6\frac{3}{10} \\ \\ 3)4\frac{12}{35} +7\frac{11}{14}= 4\frac{24}{70} +7\frac{55}{70}= 11\frac{79}{70}=12\frac{9}{70}\\ \\ 4) 1\frac{19}{36}+5\frac{7}{8} =1\frac{38}{72}+5\frac{63}{72}=6\frac{101}{72}=7\frac{29}{72}[/tex]

Пошаговое объяснение:

Ответ:

1.

[tex]11 \frac{1}{30} [/tex]

2.

[tex]12 \frac{9}{70} [/tex]

3.

[tex]6 \frac{3}{10} [/tex]

4.

[tex]7 \frac{29}{72} [/tex]