Question

5 целых 7 восьмых+6 целых 3 десятых?

Answer 1

$5 frac{7}{8} +6 frac{3}{10} =5 frac{7*5}{8*5} +6 frac{3*4}{10*4} = 5frac{35}{40} +6 frac{7}{40} =11 frac{42}{40} =11 frac{21}{20} =\\=12 frac{1}{20} =12 frac{5}{100} =12.05$