這關需要密碼才能玩！快問老師或者家長拿密碼吧。
This sublevel is locked — ask your teacher or parent for the password!
認識香港硬幣與紙幣的面值、付款與找續，是小一面試的經典情境題。小熊店長開店，小朋友要選對錢幣付款、計算找贖 — 把加減法直接用在真實購物場景，同時是金錢觀念的啟蒙：錢是有限的，買東西要比較和選擇。第七關「金錢應用題」更進一步：「想買兩件相同的玩具，手上只有 $15，可以買哪款？」「買了 $11 的西瓜後總共用了 $20，另一種水果是甚麼？」— 訓練小朋友從文字中提取數學關係，自己決定該用加法、雙倍還是減法，這正是小一應用題的核心能力。第八關「購物車推理」再上一層：「兩杯汽水共 $10，一杯汽水加一包薯片共 $8，薯片多少錢？」— 小朋友要先由雙倍分拆出單價，再用減法找出另一件貨品的價錢，一題要用上兩步推理，是最早期的代數思維訓練。
Recognising Hong Kong coins and notes, paying, and making change are classic Primary One interview scenarios. At Mr. Bear's shop, children pick the right coins to pay and work out the change — putting arithmetic straight into real shopping, and seeding financial awareness: money is finite, and buying means comparing and choosing. Sublevel 7 goes further with money word problems: "Which toy can you buy two of with $15?" and "A watermelon costs $11 and the total came to $20 — what was the other fruit?" Children learn to extract the maths from a story and decide whether to add, double, or subtract — the core skill behind Primary One word problems. Sublevel 8 raises the bar with cart puzzles: "Two cups of soda cost $10; one soda plus a packet of fries costs $8 — how much are the fries?" Children must first halve to find the single price, then subtract to find the other item — two reasoning steps in one question, and the earliest form of algebraic thinking.
玩的時候多問一句：「用$10買$6的東西，店員要找多少？」「有沒有第二種付款方法？」（$7可以是$5+$2，也可以是$2+$2+$2+$1。）同一金額、不同組合，本身就是很好的數字分拆練習。
Ask while playing: "Paying $10 for a $6 item — how much change?" and "Is there another way to pay?" ($7 can be $5+$2, or $2+$2+$2+$1.) Same amount, different combinations — excellent number decomposition practice in itself.
超市實戰最有效：讓小朋友拿著硬幣去付款，再檢查找贖對不對。家裡的儲錢罐定期倒出來分類、點算 — 免費又真實的數學課。
Real supermarkets work best: let your child hand over the coins, then check the change together. Tip the piggy bank out regularly to sort and count — a free, real-world maths lesson.