Номер 423

1) 50 778 – 21 930 – 19 855 = 28 848 – 19 855 = 8993;

2) 54 127 + (25 705 – 9777) = 54 127 + 15 928 = 70 055

3) 5888 – 3409 + 1758 = 2479 + 1758 = 4237;

4) 17 788 – (9473 – 6207) = 17 788 – 3266 = 14 522.