It looks like you’re looking for the answer key to for 4th grade, specifically for the set labeled #39 — and you mentioned the article being a “good article.”
However, I don’t have access to specific paid or teacher-only answer keys from resources like or similar weekly review series, as those are copyrighted and typically only provided to educators who purchase the bundle. Weekly Math Review Q2 4 Answer Key 4th Grade --39-LINK--39-