這關需要密碼才能玩！快問老師或者家長拿密碼吧。
This level is locked — ask your teacher or parent for the password!
1 個菠蘿 = 2 粒草莓，2 個菠蘿 = ？
把水果拖上天平，兩邊一樣重就平衡！
If 1 🍍 = 2 🍓, what do 2 🍍 make? Drag fruit onto the scale to balance it!
1個菠蘿等於2粒草莓，那麼2個菠蘿換到多少粒？「等量代換」是邏輯推理的經典題型：利用「一樣重、一樣多」的關係，一換二、二換四，逐步推出答案。遊戲由水果天秤玩到硬幣數字謎題，層層遞進，還有估計天秤傾向的觀察訓練。
If 1 pineapple equals 2 strawberries, what do 2 pineapples trade for? "Equal substitution" is a classic reasoning task: using "same weight, same amount" to swap one for two, two for four, step by step. The game builds from fruit scales to coin-number puzzles, with observation challenges on which way the scale tips.
用實物排一排最穩妥：積木當菠蘿、提子當草莓，讓小朋友親手「換」一次。口訣是：「看著天秤兩邊，一樣重才可以換。」換錯了，排出來檢查。
Laying it out with real objects is safest: blocks as pineapples, grapes as strawberries — let your child physically "swap" once. The mantra: "watch both sides — only equal weights can be swapped." If a swap goes wrong, lay it out and check.
生活裡的代換隨處可見：1杯等於2半碗、3張貼紙換1個印章。煮飯時請小朋友幫手量度，數學很自然地融入生活。
Substitutions are everywhere in daily life: 1 cup equals 2 half-bowls, 3 stickers trade for 1 stamp. Ask your child to help measure while cooking — maths blends into daily life naturally.