Question

(18 7/12+3 1/5)-7 5/12.Спасибо заранее

Answer 1

15цэлых 7/12      +6.2     -6цэлых 3/12＝9цэлых 19/30

Answer 2

$18 \frac{7}{12} + 3 \frac{1}{5} - 7 \frac{5}{12} = \frac{18 \times 12 + 7}{12} + \frac{3 \times 5 + 1}{5} - \frac{ 7\times 12 + 5}{12} = \frac{223}{12} + \frac{16}{5} - \frac{89}{12} = \frac{134}{12} + \frac{16}{5} = \frac{134 \times 5 + 16 \times 12}{60} = \frac{670 + 192}{60} = \frac{862}{60} = \frac{431}{30} = 14.4$