Решение:
- \( 80 - 18 = 62 \)
- \( 53 + 53 \times 5 = 53 + 265 = 318 \)
- \( 11 \times 13 = 143 \)
- \( 8 \times 3 + 53 = 24 + 53 = 77 \)
- \( 20 : 12 \times 13 \approx 1.67 \times 13 \approx 21.7 \)
- \( 30 : 14 \times 10 \approx 2.14 \times 10 \approx 21.4 \)
- \( 23 : 30 \approx 0.77 \)
Ответ: 62; 318; 143; 77; 21.7; 21.4; 0.77.