X03 · Optional projects job
Share 72 cards among eight stations. Then give every station two extra cards. What is each station's final amount and the new total?
Use scrap paper or a private explanation. No purchase, household information or public performance.
Adult teaching after an own try
Answer
9 + 2 = 11 per station; 8 × 11 = 88 cards.
Why
Distinguish a change in each group from a change in the total.