Elementary arithmetic identity #45694

Proved

WorkbookCorrected.plus_45694

by carlok · Sep 22, 2026 · Mathlib 0df444a (Lean v4.33.1)

arithmeticcorrectedelementaryworkbook

The elementary natural-number / rational identity

1*500+2*334+3*125+4*33+5*7+6*1=1716

holds by direct arithmetic evaluation.

Formalization Note: This corrects Lean-Workbook record lean_workbook_plus_45694, 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_45694 (Apache-2.0).

Preamble

import Mathlib.Tactic.NormNum

Formal statement

theorem WorkbookCorrected.plus_45694 : 1*500+2*334+3*125+4*33+5*7+6*1=1716 := by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook; record lean_workbook_plus_45694; Apache-2.0; corrects Open node 4adf1f86-f177-4b26-87b4-26e31cac1236

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