Question

21/20 - 3/8 - 1/5 = ?

7,8 - ( 1/4 + 1/6 ) = ?

Answer 1

1)0.475

2)0.45833333333 округлим 0.459

Answer 2

$frac{21}{20} - frac{3}{8} - frac{1}{5} = frac{42 - 15 - 8}{40} = frac{19}{40} \ \ 7.8 - ( frac{1}{4} + frac{1}{6} ) = frac{39}{5 - frac{5}{12} } = frac{443}{60}$