6б) 7*(45:9*6 - 23) + 84: (320:80) – 13 * (51:17)

Решим выражение по действиям: 1. (45 : 9 = 5) 2. (5 * 6 = 30) 3. (30 - 23 = 7) 4. (7 * 7 = 49) 5. (320 : 80 = 4) 6. (84 : 4 = 21) 7. (51 : 17 = 3) 8. (13 * 3 = 39) 9. (49 + 21 = 70) 10. (70 - 39 = 31) Ответ: 31 В формате MathJax: 1. (45 : 9 = 5) 2. (5 \times 6 = 30) 3. (30 - 23 = 7) 4. (7 \times 7 = 49) 5. (320 : 80 = 4) 6. (84 : 4 = 21) 7. (51 : 17 = 3) 8. (13 \times 3 = 39) 9. (49 + 21 = 70) 10. (70 - 39 = 31)