H04 · Optional home job
Plan three paper kits with 17 labels each. Explain one way to avoid recounting all labels.
Use scrap paper or a private explanation. No purchase, household information or public performance.
Adult teaching after an own try
Answer
3 × 17 = 30 + 21 = 51 labels.
Follow
Ask how the 30 and 21 appear in the picture. Change to 18 each: 54.