H09 · Optional home job
A pretend note says four $7 kits plus a $3 fee cost 4 + 7 + 3 = $14. Fix the first mistaken step.
Use scrap paper or a private explanation. No purchase, household information or public performance.
Adult teaching after an own try
Answer
4 × $7 + $3 = $31. Four means kits, not dollars.
Follow
Explain the repeated $7 costs, not merely a replacement answer.