Частина 1. Номер 11

34 + 1 = 35;

26 + 1 = 27;

54 – 4 = 50;

50 + 10 = 60;

90 – 40 = 50;

63 – 1 = 62;

84 – 1 = 83;

48 – 8 = 40;

50 + 5 = 55;

72 – 60 = 12;

24 + 40 = 64;

28 + 10 = 38.