Частина 1. Номер 323

20 – 12 + 28 = 36
: 4
5 – 3 + 7 = 9
• 6
30 – 18 + 42 = 54

32 – 24 + 8 = 16
: 4
8 – 6 + 2 = 4
• 2
48 – 36 + 12 = 24