正文

1. 345 + 678 = ? 2. 890 - 456 = ? 3. 123 × 45 = ? 4. 789 ÷ 21 = ? 5. 567 + 321 - 456 = ? 6. 890 - 321 + 456 = ? 7. 123 × 78 + 456 = ? 8. 345 ÷ 15 × 2 = ? 9. 789 + 123 - 456 ÷ 12 = ? 10. 567

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当然可以，以下是每个算式的答案：

  1. 345 + 678 = 1023
  2. 890 - 456 = 434
  3. 123 × 45 = 5535
  4. 789 ÷ 21 = 37
  5. 567 + 321 - 456 = 432
  6. 890 - 321 + 456 = 1025
  7. 123 × 78 + 456 = 9582
  8. 345 ÷ 15 × 2 = 46
  9. 789 + 123 - 456 ÷ 12 = 756
  10. 567 × 3 - 890 ÷ 21 = 1281
  11. 345 × 6 + 789 - 123 = 2076
  12. 890 ÷ 45 × 21 = 438
  13. 123 + 456 × 3 - 789 = 456
  14. 567 ÷ 9 + 345 × 2 = 738
  15. 890 - 123 ÷ 21 + 456 = 924
  16. 345 × 45 - 789 ÷ 3 = 13720
  17. 123 × 21 + 456 - 890 = 1089
  18. 567 ÷ 9 + 345 × 6 - 21 = 2072
  19. 890 + 123 ÷ 21 - 456 = 727
  20. 345 × 78 - 123 + 567 = 25608
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