Összeadás 4.                                                                       ×vissza

7. feladat                                                                                                                                          megoldás

  2 6 – 3 7 =        
                     
– 1 1 + 5 2 =        
                     
– 4 1 + 9 2 =        
                     
– 5 1 – 2 7 =        
                     
– 7 8 + 1 8 =