1) \( 4 \cdot 5 + 4 = 20 + 4 = 24 \)
2) \( 4 \cdot 7 + 12 = 28 + 12 = 40 \)
3) \( 4 \cdot 9 - 4 = 36 - 4 = 32 \)
4) \( 4 \cdot 8 - 8 = 32 - 8 = 24 \)
5) \( 4 \cdot 3 + 6 = 12 + 6 = 18 \)
6) \( 4 \cdot 6 - 9 = 24 - 9 = 15 \)
Ответ: 24, 40, 32, 24, 18, 15.