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: Digital systems reduce the margin of error in complex calculations. ✅ Verified Answers Summary

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A: Cross-check three sources: (1) Official Cambridge answer keys (if available), (2) Verified IELTS tutor blogs, (3) Your own logical deduction. If a forum says "spreadsheets are safe" but the passage says "spreadsheets are error-prone," discard that source. : Digital systems reduce the margin of error