Задание

Найдите сумму десятичных дробей:

 \(\displaystyle 2\)\(\displaystyle ,\)\(\displaystyle 5\)\(\displaystyle 4\)
\(\displaystyle +\)    
 \(\displaystyle 3\)\(\displaystyle ,\)\(\displaystyle 8\)\(\displaystyle 9\)
 
 [ ]\(\displaystyle ,\)[ ][ ]