Question

| 7,5 |+|- 5,3| 2) |12,8|-|-5 целых 1/4|

Answer 1

$|7.5| + | - 5.3| \ 7.5 + 5.3 = 12.8 \ \ 2) |12.8| - | - 5 frac{1}{4} | \ \ 12.8 - | - frac{5}{4} | \ \ frac{64}{5} - frac{5}{4} \ \ frac{256 - 25}{20} \ \ 11.5$