Elementary arithmetic identity #44878

Proved

WorkbookCorrected.plus_44878

by carlok · Sep 29, 2026 · Mathlib 0df444a (Lean v4.33.1)

arithmeticcorrectedelementaryworkbook

The elementary natural-number / rational identity

646646 + 7461300 + 33575850 + 77597520 + 101846745 + 79081002 + 36611575 + 9909900 + 1486485 + 110110 + 3003 = 348330136

holds by direct arithmetic evaluation.

Formalization Note: This corrects Lean-Workbook record lean_workbook_plus_44878, which omitted a compilable colon/type annotation and/or used a preamble of only Mathlib.Analysis.Complex.Basic.

Source: InternLM Lean-Workbook, record lean_workbook_plus_44878 (Apache-2.0).

Preamble

import Mathlib.Tactic.NormNum

Formal statement

theorem WorkbookCorrected.plus_44878 : 646646 + 7461300 + 33575850 + 77597520 + 101846745 + 79081002 + 36611575 + 9909900 + 1486485 + 110110 + 3003 = 348330136 := by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook; record lean_workbook_plus_44878; Apache-2.0; corrects Open node a4ea265f-d12a-4bf1-ada0-3f25ca184c31

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