Ответ:

[tex] | \frac{7}{30} | \times | - 4 \frac{2}{7} | + 9.87[/tex]

[tex] \frac{7}{30} \times 4 \frac{2}{7} + 9.87[/tex]

[tex] \frac{7}{30} \times \frac{30}{7} = \frac{1}{1} = 1[/tex]

[tex]1 + 9.87 = 10.87[/tex]

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