In many games a business brings in coins every round: a mine, a hen house, a beehive. If +5 stands above the business, 5 coins are added in every round.
Every tile in the row is one round. After 6 rounds that is 6 × 5 = 30 coins. The dashed tile is your stock at the start, it is counted once.
The dark tag above a tile is an upgrade: from that round on the business brings in more. With +4 and an upgrade to +7 from round 3 you work out 2 × 4 + 7 × 3 for rounds 1 to 5.
If a purchase with its price stands on the right, you look for the first round in which you have enough coins.
Example
For parents
What does this exercise practice?
The child experiences multiplying as repeated adding in a story known from building games. With the upgrade it learns to split a course into two parts, and with the purchase to reach a goal by counting on.
Common pitfalls
The most common mistake is to use the upgrade for all rounds instead of only from its round on. The stock is also easily forgotten or added again in every round. For the purchase the first round with enough money counts, not the last one in the row.
How to practice at home
Play it with play money: you get 3 coins every round, from the fourth round on 5. How many do you have after eight rounds, and when can you afford something that costs 30?
Related: Recipe Math, Harvest Profit