Kết quả của phép tính $\left( { + 25} \right) + \left( { + 15} \right)$ là

$- 70$                         

$70$                            

$60$                          

$- 60$

$1818$                         

$1$                            

$0$                          

$- 1818$

$534$                         

$524$   

$- 524$                          

$- 534$

$- 19082$                         

$18092$                            

$- 18092$                          

$- 18093$

$x =  - 452$                         

$x =  - 254$                            

$x = 542$                          

$x = 254$

$678 + \left( { - 4} \right) < 678$                         

$4 + \left( { - 678} \right) >  - 678$                            

$678 + \left( { - 4} \right) = 678$                            

$4 + \left( { - 678} \right) =  - 674$